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121221121011 = 3107377635891
BaseRepresentation
bin111000011100101010…
…1111000001111110011
3102120220002220222121120
41300321111320033303
53441230101333021
6131404353153323
711520654345654
oct1607125701763
9376802828546
10121221121011
1147456187441
121b5b085b843
13b57b195293
145c1d5b352b
1532472b42c6
hex1c395783f3

121221121011 has 8 divisors (see below), whose sum is σ = 163138705344. Its totient is φ = 80058808680.

The previous prime is 121221121003. The next prime is 121221121013. The reversal of 121221121011 is 110121122121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121221121011 - 23 = 121221121003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221121013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188817625 + ... + 188818266.

It is an arithmetic number, because the mean of its divisors is an integer number (20392338168).

Almost surely, 2121221121011 is an apocalyptic number.

121221121011 is a deficient number, since it is larger than the sum of its proper divisors (41917584333).

121221121011 is a wasteful number, since it uses less digits than its factorization.

121221121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377636001.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121221121011 its reverse (110121122121), we get a palindrome (231342243132).

The spelling of 121221121011 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".

Divisors: 1 3 107 321 377635891 1132907673 40407040337 121221121011