21216199560324 has 96 divisors (see below), whose sum is σ = 51472447488000. Its totient is φ = 6794289540480.

The previous prime is 21216199560313. The next prime is 21216199560343. The reversal of 21216199560324 is 42306599161212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102271897 + ... + 102479135.

It is an arithmetic number, because the mean of its divisors is an integer number (536171328000).

Almost surely, 2^{21216199560324} is an apocalyptic number.

It is an amenable number.

21216199560324 is an abundant number, since it is smaller than the sum of its proper divisors (30256247927676).

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

21216199560324 is a wasteful number, since it uses less digits than its factorization.

21216199560324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209273 (or 209271 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 21216199560324 in words is "twenty-one trillion, two hundred sixteen billion, one hundred ninety-nine million, five hundred sixty thousand, three hundred twenty-four".