313121132331 has 16 divisors (see below), whose sum is σ = 481861095168. Its totient is φ = 177154812000.

The previous prime is 313121132327. The next prime is 313121132339. The reversal of 313121132331 is 133231121313.

It is not a de Polignac number, because 313121132331 - 2² = 313121132327 is a prime.

It is a super-2 number, since 2×313121132331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (313121132339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73812385 + ... + 73816626.

It is an arithmetic number, because the mean of its divisors is an integer number (30116318448).

Almost surely, 2^313121132331 is an apocalyptic number.

313121132331 is a deficient number, since it is larger than the sum of its proper divisors (168739962837).

313121132331 is a wasteful number, since it uses less digits than its factorization.

313121132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147629122.

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

Adding to 313121132331 its reverse (133231121313), we get a palindrome (446352253644).

The spelling of 313121132331 in words is "three hundred thirteen billion, one hundred twenty-one million, one hundred thirty-two thousand, three hundred thirty-one".