21311303439272 has 64 divisors (see below), whose sum is σ = 50635330381440. Its totient is φ = 8166988742400.

The previous prime is 21311303439247. The next prime is 21311303439287. The reversal of 21311303439272 is 27293430311312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283538423 + ... + 283613574.

It is an arithmetic number, because the mean of its divisors is an integer number (791177037210).

Almost surely, 2^{21311303439272} is an apocalyptic number.

21311303439272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21311303439272 is an abundant number, since it is smaller than the sum of its proper divisors (29324026942168).

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

21311303439272 is a wasteful number, since it uses less digits than its factorization.

21311303439272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567152082 (or 567152078 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 21311303439272 in words is "twenty-one trillion, three hundred eleven billion, three hundred three million, four hundred thirty-nine thousand, two hundred seventy-two".