21201200992 has 24 divisors (see below), whose sum is σ = 42424128432. Its totient is φ = 10426819200.

The previous prime is 21201200987. The next prime is 21201201061. The reversal of 21201200992 is 29900210212.

It is a self number, because there is not a number n which added to its sum of digits gives 21201200992.

It is a congruent number.

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, 5428684 + ... + 5432587.

It is an arithmetic number, because the mean of its divisors is an integer number (1767672018).

Almost surely, 2^21201200992 is an apocalyptic number.

It is an amenable number.

21201200992 is an abundant number, since it is smaller than the sum of its proper divisors (21222927440).

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

21201200992 is a wasteful number, since it uses less digits than its factorization.

21201200992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861342 (or 10861334 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21201200992 in words is "twenty-one billion, two hundred one million, two hundred thousand, nine hundred ninety-two".