21200112999 has 96 divisors (see below), whose sum is σ = 36193364480. Its totient is φ = 11842972416.

The previous prime is 21200112937. The next prime is 21200113021. The reversal of 21200112999 is 99921100212.

It is not a de Polignac number, because 21200112999 - 2²⁷ = 21065895271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200112919) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5508894 + ... + 5512740.

Almost surely, 2^21200112999 is an apocalyptic number.

21200112999 is a deficient number, since it is larger than the sum of its proper divisors (14993251481).

21200112999 is a wasteful number, since it uses less digits than its factorization.

21200112999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989 (or 3986 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 21200112999 in words is "twenty-one billion, two hundred million, one hundred twelve thousand, nine hundred ninety-nine".