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21121011222 = 2326471329871
BaseRepresentation
bin10011101010111010…
…010000111000010110
32000111221220112112220
4103222322100320112
5321223434324342
613411452323210
71345253430123
oct235272207026
960457815486
1021121011222
118a59295383
124115473506
131cb7a0409c
14104513374a
158393a25ec
hex4eae90e16

21121011222 has 16 divisors (see below), whose sum is σ = 42258012672. Its totient is φ = 7037672040.

The previous prime is 21121011209. The next prime is 21121011239. The reversal of 21121011222 is 22211012112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649054 + ... + 680817.

It is an arithmetic number, because the mean of its divisors is an integer number (2641125792).

Almost surely, 221121011222 is an apocalyptic number.

21121011222 is an abundant number, since it is smaller than the sum of its proper divisors (21137001450).

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

21121011222 is a wasteful number, since it uses less digits than its factorization.

21121011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332523.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121011222 its reverse (22211012112), we get a palindrome (43332023334).

The spelling of 21121011222 in words is "twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred twenty-two".

Divisors: 1 2 3 6 2647 5294 7941 15882 1329871 2659742 3989613 7979226 3520168537 7040337074 10560505611 21121011222