21102122211012 has 72 divisors (see below), whose sum is σ = 53367496949312. Its totient is φ = 7030610136000.

The previous prime is 21102122210969. The next prime is 21102122211043. The reversal of 21102122211012 is 21011222120112.

21102122211012 is a `hidden beast` number, since 211 + 0 + 212 + 221 + 10 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1058961393 + ... + 1058981319.

Almost surely, 2^{21102122211012} is an apocalyptic number.

It is an amenable number.

21102122211012 is an abundant number, since it is smaller than the sum of its proper divisors (32265374738300).

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

21102122211012 is a wasteful number, since it uses less digits than its factorization.

21102122211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32809 (or 32804 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21102122211012 its reverse (21011222120112), we get a palindrome (42113344331124).

The spelling of 21102122211012 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred eleven thousand, twelve".