31310231421321 has 6 divisors (see below), whose sum is σ = 45225889830810. Its totient is φ = 20873487614208.

The previous prime is 31310231421307. The next prime is 31310231421331. The reversal of 31310231421321 is 12312413201313.

31310231421321 is a `hidden beast` number, since 3 + 1 + 3 + 1 + 0 + 2 + 314 + 21 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30749642295696 + 560589125625 = 5545236^2 + 748725^2 .

It is not a de Polignac number, because 31310231421321 - 2⁵ = 31310231421289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31310231421331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739457301176 + ... + 1739457301193.

It is an arithmetic number, because the mean of its divisors is an integer number (7537648305135).

Almost surely, 2^{31310231421321} is an apocalyptic number.

It is an amenable number.

31310231421321 is a deficient number, since it is larger than the sum of its proper divisors (13915658409489).

31310231421321 is a wasteful number, since it uses less digits than its factorization.

31310231421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478914602375 (or 3478914602372 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 31310231421321 its reverse (12312413201313), we get a palindrome (43622644622634).

The spelling of 31310231421321 in words is "thirty-one trillion, three hundred ten billion, two hundred thirty-one million, four hundred twenty-one thousand, three hundred twenty-one".