22121553312 has 36 divisors (see below), whose sum is σ = 62908168050. Its totient is φ = 7373851008.

The previous prime is 22121553299. The next prime is 22121553359. The reversal of 22121553312 is 21335512122.

22121553312 is a `hidden beast` number, since 2 + 2 + 121 + 5 + 533 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20060756496 + 2060796816 = 141636^2 + 45396^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 38405187 + ... + 38405762.

Almost surely, 2^22121553312 is an apocalyptic number.

It is an amenable number.

22121553312 is an abundant number, since it is smaller than the sum of its proper divisors (40786614738).

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

22121553312 is a wasteful number, since it uses less digits than its factorization.

22121553312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76810965 (or 76810954 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The spelling of 22121553312 in words is "twenty-two billion, one hundred twenty-one million, five hundred fifty-three thousand, three hundred twelve".