21515531053112 has 16 divisors (see below), whose sum is σ = 40349732928840. Its totient is φ = 10755602272096.

The previous prime is 21515531053111. The next prime is 21515531053127. The reversal of 21515531053112 is 21135013551512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21515531053111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270364538 + ... + 270444105.

Almost surely, 2^{21515531053112} is an apocalyptic number.

It is an amenable number.

21515531053112 is a deficient number, since it is larger than the sum of its proper divisors (18834201875728).

21515531053112 is a wasteful number, since it uses less digits than its factorization.

21515531053112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540813622 (or 540813618 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 21515531053112 in words is "twenty-one trillion, five hundred fifteen billion, five hundred thirty-one million, fifty-three thousand, one hundred twelve".