21200020000012 has 48 divisors (see below), whose sum is σ = 43266338483200. Its totient is φ = 9085514634000.

The previous prime is 21200020000009. The next prime is 21200020000031. The reversal of 21200020000012 is 21000002000212.

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 15 ways as a sum of consecutive naturals, for example, 69780637 + ... + 70083787.

Almost surely, 2^{21200020000012} is an apocalyptic number.

It is an amenable number.

21200020000012 is an abundant number, since it is smaller than the sum of its proper divisors (22066318483188).

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

21200020000012 is a wasteful number, since it uses less digits than its factorization.

21200020000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354147 (or 354131 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21200020000012 its reverse (21000002000212), we get a palindrome (42200022000224).

The spelling of 21200020000012 in words is "twenty-one trillion, two hundred billion, twenty million, twelve", and thus it is an aban number.