21102122221120 has 56 divisors (see below), whose sum is σ = 50487577651008. Its totient is φ = 8400844838400.

The previous prime is 21102122221111. The next prime is 21102122221139. The reversal of 21102122221120 is 2112222120112.

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 7 ways as a sum of consecutive naturals, for example, 156198196 + ... + 156333235.

Almost surely, 2^{21102122221120} is an apocalyptic number.

21102122221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102122221120 is an abundant number, since it is smaller than the sum of its proper divisors (29385455429888).

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

21102122221120 is a wasteful number, since it uses less digits than its factorization.

21102122221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312531659 (or 312531649 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21102122221120 its reverse (2112222120112), we get a palindrome (23214344341232).

The spelling of 21102122221120 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty".