21122300992 has 28 divisors (see below), whose sum is σ = 45138765196. Its totient is φ = 9748753920.

The previous prime is 21122300977. The next prime is 21122301001. The reversal of 21122300992 is 29900322112.

It can be written as a sum of positive squares in 2 ways, for example, as 13777125376 + 7345175616 = 117376^2 + 85704^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12692859 + ... + 12694522.

It is an arithmetic number, because the mean of its divisors is an integer number (1612098757).

Almost surely, 2^21122300992 is an apocalyptic number.

It is an amenable number.

21122300992 is an abundant number, since it is smaller than the sum of its proper divisors (24016464204).

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

21122300992 is a wasteful number, since it uses less digits than its factorization.

21122300992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25387406 (or 25387396 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21122300992 in words is "twenty-one billion, one hundred twenty-two million, three hundred thousand, nine hundred ninety-two".