3121313320131 has 32 divisors (see below), whose sum is σ = 4294821061440. Its totient is φ = 2014891536384.

The previous prime is 3121313320127. The next prime is 3121313320163. The reversal of 3121313320131 is 1310233131213.

It is not a de Polignac number, because 3121313320131 - 2² = 3121313320127 is a prime.

It is a super-2 number, since 2×3121313320131² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3121313320121) 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, 50997115 + ... + 51058283.

It is an arithmetic number, because the mean of its divisors is an integer number (134213158170).

Almost surely, 2^{3121313320131} is an apocalyptic number.

3121313320131 is a deficient number, since it is larger than the sum of its proper divisors (1173507741309).

3121313320131 is a wasteful number, since it uses less digits than its factorization.

3121313320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63415.

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

Adding to 3121313320131 its reverse (1310233131213), we get a palindrome (4431546451344).

The spelling of 3121313320131 in words is "three trillion, one hundred twenty-one billion, three hundred thirteen million, three hundred twenty thousand, one hundred thirty-one".