31321300032120 has 128 divisors (see below), whose sum is σ = 107389381386240. Its totient is φ = 7159016494080.

The previous prime is 31321300032091. The next prime is 31321300032157. The reversal of 31321300032120 is 2123000312313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 47031060 + ... + 47692380.

It is an arithmetic number, because the mean of its divisors is an integer number (838979542080).

Almost surely, 2^{31321300032120} is an apocalyptic number.

31321300032120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31321300032120 is an abundant number, since it is smaller than the sum of its proper divisors (76068081354120).

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

31321300032120 is a wasteful number, since it uses less digits than its factorization.

31321300032120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717725 (or 717721 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31321300032120 its reverse (2123000312313), we get a palindrome (33444300344433).

The spelling of 31321300032120 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred million, thirty-two thousand, one hundred twenty".