21102212992 has 48 divisors (see below), whose sum is σ = 48903181920. Its totient is φ = 9043802880.

The previous prime is 21102212969. The next prime is 21102213007. The reversal of 21102212992 is 29921220112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1675984 + ... + 1688527.

It is an arithmetic number, because the mean of its divisors is an integer number (1018816290).

Almost surely, 2^21102212992 is an apocalyptic number.

It is an amenable number.

21102212992 is an abundant number, since it is smaller than the sum of its proper divisors (27800968928).

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

21102212992 is an equidigital number, since it uses as much as digits as its factorization.

21102212992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364539 (or 3364520 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21102212992 in words is "twenty-one billion, one hundred two million, two hundred twelve thousand, nine hundred ninety-two".