21072810292912 has 40 divisors (see below), whose sum is σ = 46718900647200. Its totient is φ = 9020040955392.

The previous prime is 21072810292903. The next prime is 21072810292921. The reversal of 21072810292912 is 21929201827012.

It is an interprime number because it is at equal distance from previous prime (21072810292903) and next prime (21072810292921).

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, 116194987 + ... + 116376202.

It is an arithmetic number, because the mean of its divisors is an integer number (1167972516180).

Almost surely, 2^{21072810292912} is an apocalyptic number.

It is an amenable number.

21072810292912 is an abundant number, since it is smaller than the sum of its proper divisors (25646090354288).

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

21072810292912 is a wasteful number, since it uses less digits than its factorization.

21072810292912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232572013 (or 232572007 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 21072810292912 in words is "twenty-one trillion, seventy-two billion, eight hundred ten million, two hundred ninety-two thousand, nine hundred twelve".