31312103231031 has 12 divisors (see below), whose sum is σ = 48565711134072. Its totient is φ = 17892630417648.

The previous prime is 31312103231011. The next prime is 31312103231033. The reversal of 31312103231031 is 13013230121313.

It is not a de Polignac number, because 31312103231031 - 2⁵ = 31312103230999 is a prime.

It is a super-2 number, since 2×31312103231031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312103230992 and 31312103231010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312103231033) 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, 106503752340 + ... + 106503752633.

It is an arithmetic number, because the mean of its divisors is an integer number (4047142594506).

Almost surely, 2^{31312103231031} is an apocalyptic number.

31312103231031 is a deficient number, since it is larger than the sum of its proper divisors (17253607903041).

31312103231031 is a wasteful number, since it uses less digits than its factorization.

31312103231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213007504990 (or 213007504983 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31312103231031 its reverse (13013230121313), we get a palindrome (44325333352344).

The spelling of 31312103231031 in words is "thirty-one trillion, three hundred twelve billion, one hundred three million, two hundred thirty-one thousand, thirty-one".