2131222131 has 64 divisors (see below), whose sum is σ = 3354624000. Its totient is φ = 1335359520.

The previous prime is 2131222117. The next prime is 2131222183. The reversal of 2131222131 is 1312221312.

It is not a de Polignac number, because 2131222131 - 2⁵ = 2131222099 is a prime.

It is a super-2 number, since 2×2131222131² = 9084215543328362322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131222111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5086240 + ... + 5086658.

It is an arithmetic number, because the mean of its divisors is an integer number (52416000).

Almost surely, 2^2131222131 is an apocalyptic number.

2131222131 is a deficient number, since it is larger than the sum of its proper divisors (1223401869).

2131222131 is a wasteful number, since it uses less digits than its factorization.

2131222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 615 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2131222131 is about 46165.1614423691. The cubic root of 2131222131 is about 1286.8943844303.

Adding to 2131222131 its reverse (1312221312), we get a palindrome (3443443443).

It can be divided in two parts, 2 and 131222131, that multiplied together give a palindrome (262444262).

The spelling of 2131222131 in words is "two billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred thirty-one".