31320330311021 has 8 divisors (see below), whose sum is σ = 31851312652800. Its totient is φ = 30789352278880.

The previous prime is 31320330310981. The next prime is 31320330311059. The reversal of 31320330311021 is 12011303302313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320330311021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320330311521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15804020 + ... + 17675058.

It is an arithmetic number, because the mean of its divisors is an integer number (3981414081600).

Almost surely, 2^{31320330311021} is an apocalyptic number.

It is an amenable number.

31320330311021 is a deficient number, since it is larger than the sum of its proper divisors (530982341779).

31320330311021 is a wasteful number, since it uses less digits than its factorization.

31320330311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154819.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31320330311021 its reverse (12011303302313), we get a palindrome (43331633613334).

The spelling of 31320330311021 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty million, three hundred eleven thousand, twenty-one".