21335372427712 has 56 divisors (see below), whose sum is σ = 48386027911520. Its totient is φ = 9143645783040.

The previous prime is 21335372427661. The next prime is 21335372427739. The reversal of 21335372427712 is 21772427353312.

It is a tau number, because it is divible by the number of its divisors (56).

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, 81019714 + ... + 81282622.

Almost surely, 2^{21335372427712} is an apocalyptic number.

It is an amenable number.

21335372427712 is an abundant number, since it is smaller than the sum of its proper divisors (27050655483808).

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

21335372427712 is a wasteful number, since it uses less digits than its factorization.

21335372427712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444069 (or 444059 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 49.

The spelling of 21335372427712 in words is "twenty-one trillion, three hundred thirty-five billion, three hundred seventy-two million, four hundred twenty-seven thousand, seven hundred twelve".