3121679149531 has 2 divisors, whose sum is σ = 3121679149532. Its totient is φ = 3121679149530.

The previous prime is 3121679149507. The next prime is 3121679149543. The reversal of 3121679149531 is 1359419761213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121679149531 - 2¹⁹ = 3121678625243 is a prime.

It is a super-2 number, since 2×3121679149531² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3121679129531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560839574765 + 1560839574766.

It is an arithmetic number, because the mean of its divisors is an integer number (1560839574766).

Almost surely, 2^{3121679149531} is an apocalyptic number.

3121679149531 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121679149531 is an equidigital number, since it uses as much as digits as its factorization.

3121679149531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The spelling of 3121679149531 in words is "three trillion, one hundred twenty-one billion, six hundred seventy-nine million, one hundred forty-nine thousand, five hundred thirty-one".