31130012023331 has 24 divisors (see below), whose sum is σ = 35618621818080. Its totient is φ = 27040556454912.

The previous prime is 31130012023157. The next prime is 31130012023333. The reversal of 31130012023331 is 13332021003113.

It is not a de Polignac number, because 31130012023331 - 2⁴² = 26731965512227 is a prime.

It is a super-2 number, since 2×31130012023331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31130012023297 and 31130012023306.

It is not an unprimeable number, because it can be changed into a prime (31130012023333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21878615 + ... + 23257983.

It is an arithmetic number, because the mean of its divisors is an integer number (1484109242420).

Almost surely, 2^{31130012023331} is an apocalyptic number.

31130012023331 is a deficient number, since it is larger than the sum of its proper divisors (4488609794749).

31130012023331 is a wasteful number, since it uses less digits than its factorization.

31130012023331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385423 (or 1385406 counting only the distinct ones).

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

Adding to 31130012023331 its reverse (13332021003113), we get a palindrome (44462033026444).

The spelling of 31130012023331 in words is "thirty-one trillion, one hundred thirty billion, twelve million, twenty-three thousand, three hundred thirty-one".