31213303210131 has 32 divisors (see below), whose sum is σ = 48849126366720. Its totient is φ = 17353934159616.

The previous prime is 31213303210129. The next prime is 31213303210181. The reversal of 31213303210131 is 13101230331213.

It is not a de Polignac number, because 31213303210131 - 2¹ = 31213303210129 is a prime.

It is a super-2 number, since 2×31213303210131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31213303210181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116709360 + ... + 116976498.

It is an arithmetic number, because the mean of its divisors is an integer number (1526535198960).

Almost surely, 2^{31213303210131} is an apocalyptic number.

31213303210131 is a deficient number, since it is larger than the sum of its proper divisors (17635823156589).

31213303210131 is a wasteful number, since it uses less digits than its factorization.

31213303210131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417563.

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

Adding to 31213303210131 its reverse (13101230331213), we get a palindrome (44314533541344).

It can be divided in two parts, 3121330 and 3210131, that added together give a triangular number (6331461 = T₃₅₅₈).

The spelling of 31213303210131 in words is "thirty-one trillion, two hundred thirteen billion, three hundred three million, two hundred ten thousand, one hundred thirty-one".