31011402131 has 4 divisors (see below), whose sum is σ = 31285839432. Its totient is φ = 30736964832.

The previous prime is 31011402109. The next prime is 31011402151. The reversal of 31011402131 is 13120411013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13120411013 = 3001 ⋅4372013.

It is a cyclic number.

It is not a de Polignac number, because 31011402131 - 2¹⁴ = 31011385747 is a prime.

It is a super-2 number, since 2×31011402131² (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 (31011402151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137218481 + ... + 137218706.

It is an arithmetic number, because the mean of its divisors is an integer number (7821459858).

Almost surely, 2^31011402131 is an apocalyptic number.

31011402131 is a deficient number, since it is larger than the sum of its proper divisors (274437301).

31011402131 is a wasteful number, since it uses less digits than its factorization.

31011402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274437300.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31011402131 its reverse (13120411013), we get a palindrome (44131813144).

The spelling of 31011402131 in words is "thirty-one billion, eleven million, four hundred two thousand, one hundred thirty-one".