2131312131 has 12 divisors (see below), whose sum is σ = 3315374608. Its totient is φ = 1311576624.

The previous prime is 2131312087. The next prime is 2131312163. The reversal of 2131312131 is 1312131312.

It is not a de Polignac number, because 2131312131 - 2⁷ = 2131312003 is a prime.

It is a super-2 number, since 2×2131312131² = 9084982799495522322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131312231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9108055 + ... + 9108288.

Almost surely, 2^2131312131 is an apocalyptic number.

2131312131 is a deficient number, since it is larger than the sum of its proper divisors (1184062477).

2131312131 is a wasteful number, since it uses less digits than its factorization.

2131312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18216362 (or 18216359 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2131312131 is about 46166.1361931015. The cubic root of 2131312131 is about 1286.9124990545.

Adding to 2131312131 its reverse (1312131312), we get a palindrome (3443443443).

It can be divided in two parts, 213 and 1312131, that multiplied together give a triangular number (279483903 = T₂₃₆₄₂).

The spelling of 2131312131 in words is "two billion, one hundred thirty-one million, three hundred twelve thousand, one hundred thirty-one".