312321131331 has 8 divisors (see below), whose sum is σ = 454285281984. Its totient is φ = 189285534120.

The previous prime is 312321131327. The next prime is 312321131393. The reversal of 312321131331 is 133131123213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312321131331 - 2² = 312321131327 is a prime.

It is a super-2 number, since 2×312321131331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312321131431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4732138321 + ... + 4732138386.

It is an arithmetic number, because the mean of its divisors is an integer number (56785660248).

Almost surely, 2^312321131331 is an apocalyptic number.

312321131331 is a deficient number, since it is larger than the sum of its proper divisors (141964150653).

312321131331 is a wasteful number, since it uses less digits than its factorization.

312321131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9464276721.

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

Adding to 312321131331 its reverse (133131123213), we get a palindrome (445452254544).

The spelling of 312321131331 in words is "three hundred twelve billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-one".