21152255151252 has 24 divisors (see below), whose sum is σ = 51952907389600. Its totient is φ = 6679659521376.

The previous prime is 21152255151149. The next prime is 21152255151311. The reversal of 21152255151252 is 25215155225112.

It is a self number, because there is not a number n which added to its sum of digits gives 21152255151252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46386524227 + ... + 46386524682.

Almost surely, 2^{21152255151252} is an apocalyptic number.

It is an amenable number.

21152255151252 is an abundant number, since it is smaller than the sum of its proper divisors (30800652238348).

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

21152255151252 is a wasteful number, since it uses less digits than its factorization.

21152255151252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92773048935 (or 92773048933 counting only the distinct ones).

The product of its digits is 100000, while the sum is 39.

The spelling of 21152255151252 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred fifty-five million, one hundred fifty-one thousand, two hundred fifty-two".