31310120131 has 8 divisors (see below), whose sum is σ = 32161759344. Its totient is φ = 30458766240.

The previous prime is 31310120119. The next prime is 31310120173. The reversal of 31310120131 is 13102101313.

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

It is a cyclic number.

It is not a de Polignac number, because 31310120131 - 2⁷ = 31310120003 is a prime.

It is a super-2 number, since 2×31310120131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310120111) 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, 161301 + ... + 297721.

It is an arithmetic number, because the mean of its divisors is an integer number (4020219918).

Almost surely, 2^31310120131 is an apocalyptic number.

31310120131 is a deficient number, since it is larger than the sum of its proper divisors (851639213).

31310120131 is a wasteful number, since it uses less digits than its factorization.

31310120131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142661.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31310120131 its reverse (13102101313), we get a palindrome (44412221444).

The spelling of 31310120131 in words is "thirty-one billion, three hundred ten million, one hundred twenty thousand, one hundred thirty-one".