2112312131 has 4 divisors (see below), whose sum is σ = 2180451264. Its totient is φ = 2044173000.

The previous prime is 2112312109. The next prime is 2112312143. The reversal of 2112312131 is 1312132112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2112312131 - 2¹⁸ = 2112049987 is a prime.

It is a super-2 number, since 2×2112312131² = 8923725077539522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112312151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34069520 + ... + 34069581.

It is an arithmetic number, because the mean of its divisors is an integer number (545112816).

Almost surely, 2^2112312131 is an apocalyptic number.

2112312131 is a deficient number, since it is larger than the sum of its proper divisors (68139133).

2112312131 is an equidigital number, since it uses as much as digits as its factorization.

2112312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68139132.

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

The square root of 2112312131 is about 45959.8969863946. The cubic root of 2112312131 is about 1283.0769341184.

Adding to 2112312131 its reverse (1312132112), we get a palindrome (3424444243).

The spelling of 2112312131 in words is "two billion, one hundred twelve million, three hundred twelve thousand, one hundred thirty-one".