31113000012031 has 12 divisors (see below), whose sum is σ = 36262141216560. Its totient is φ = 26617098973920.

The previous prime is 31113000012013. The next prime is 31113000012137. The reversal of 31113000012031 is 13021000031113.

It is not a de Polignac number, because 31113000012031 - 2¹¹ = 31113000009983 is a prime.

It is a super-2 number, since 2×31113000012031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31113000011996 and 31113000012014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113000012331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609340291 + ... + 609391348.

It is an arithmetic number, because the mean of its divisors is an integer number (3021845101380).

Almost surely, 2^{31113000012031} is an apocalyptic number.

31113000012031 is a deficient number, since it is larger than the sum of its proper divisors (5149141204529).

31113000012031 is a wasteful number, since it uses less digits than its factorization.

31113000012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218732174 (or 1218732167 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31113000012031 its reverse (13021000031113), we get a palindrome (44134000043144).

The spelling of 31113000012031 in words is "thirty-one trillion, one hundred thirteen billion, twelve thousand, thirty-one".