31313022110321 has 16 divisors (see below), whose sum is σ = 37342427673600. Its totient is φ = 25672657602768.

The previous prime is 31313022110291. The next prime is 31313022110347. The reversal of 31313022110321 is 12301122031313.

It is a cyclic number.

It is not a de Polignac number, because 31313022110321 - 2⁴² = 26914975599217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (31313022110351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43119410 + ... + 43839588.

It is an arithmetic number, because the mean of its divisors is an integer number (2333901729600).

Almost surely, 2^{31313022110321} is an apocalyptic number.

It is an amenable number.

31313022110321 is a deficient number, since it is larger than the sum of its proper divisors (6029405563279).

31313022110321 is a wasteful number, since it uses less digits than its factorization.

31313022110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990268.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31313022110321 its reverse (12301122031313), we get a palindrome (43614144141634).

The spelling of 31313022110321 in words is "thirty-one trillion, three hundred thirteen billion, twenty-two million, one hundred ten thousand, three hundred twenty-one".