31130323220113 has 12 divisors (see below), whose sum is σ = 33719967893388. Its totient is φ = 28726475281920.

The previous prime is 31130323220099. The next prime is 31130323220177. The reversal of 31130323220113 is 31102232303113.

It can be written as a sum of positive squares in 6 ways, for example, as 23010604581969 + 8119718638144 = 4796937^2 + 2849512^2 .

It is not a de Polignac number, because 31130323220113 - 2²⁵ = 31130289665681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31130323223113) 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 11 ways as a sum of consecutive naturals, for example, 28982820 + ... + 30037717.

It is an arithmetic number, because the mean of its divisors is an integer number (2809997324449).

Almost surely, 2^{31130323220113} is an apocalyptic number.

It is an amenable number.

31130323220113 is a deficient number, since it is larger than the sum of its proper divisors (2589644673275).

31130323220113 is a wasteful number, since it uses less digits than its factorization.

31130323220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59023684 (or 59023671 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31130323220113 its reverse (31102232303113), we get a palindrome (62232555523226).

The spelling of 31130323220113 in words is "thirty-one trillion, one hundred thirty billion, three hundred twenty-three million, two hundred twenty thousand, one hundred thirteen".