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121221212122110 = 23523199388149983
BaseRepresentation
bin11011100100000000000011…
…010010011010101111111110
3120220012122010200211121010010
4123210000003102122233332
5111342042020300401420
61105452131150524050
734350641433020622
oct3344000322325776
9526178120747103
10121221212122110
113569669a015631
1211719596806626
13528415a569209
1421d11d0847182
15e033966de4e0
hex6e400349abfe

121221212122110 has 64 divisors (see below), whose sum is σ = 303732405669888. Its totient is φ = 30904678489344.

The previous prime is 121221212122103. The next prime is 121221212122117. The reversal of 121221212122110 is 11221212122121.

It is an interprime number because it is at equal distance from previous prime (121221212122103) and next prime (121221212122117).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221212122117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42699822 + ... + 45450161.

It is an arithmetic number, because the mean of its divisors is an integer number (4745818838592).

Almost surely, 2121221212122110 is an apocalyptic number.

121221212122110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221212122110 is an abundant number, since it is smaller than the sum of its proper divisors (182511193547778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221212122110 is a wasteful number, since it uses less digits than its factorization.

121221212122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88152009.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121221212122110 its reverse (11221212122121), we get a palindrome (132442424244231).

The spelling of 121221212122110 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred ten".

Divisors: 1 2 3 5 6 10 15 23 30 46 69 115 138 230 345 690 1993 3986 5979 9965 11958 19930 29895 45839 59790 91678 137517 229195 275034 458390 687585 1375170 88149983 176299966 264449949 440749915 528899898 881499830 1322249745 2027449609 2644499490 4054899218 6082348827 10137248045 12164697654 20274496090 30411744135 60823488270 175682916119 351365832238 527048748357 878414580595 1054097496714 1756829161190 2635243741785 4040707070737 5270487483570 8081414141474 12122121212211 20203535353685 24244242424422 40407070707370 60610606061055 121221212122110