12312131 has 8 divisors (see below), whose sum is σ = 14039424. Its totient is φ = 10696320.

The previous prime is 12312119. The next prime is 12312143. The reversal of 12312131 is 13121321.

It is an interprime number because it is at equal distance from previous prime (12312119) and next prime (12312143).

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 12312131 - 2⁶ = 12312067 is a prime.

It is a super-2 number, since 2×12312131² = 303177139522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312101) 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, 27635 + ... + 28076.

It is an arithmetic number, because the mean of its divisors is an integer number (1754928).

Almost surely, 2^12312131 is an apocalyptic number.

12312131 is a deficient number, since it is larger than the sum of its proper divisors (1727293).

12312131 is a wasteful number, since it uses less digits than its factorization.

12312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55741.

The product of its digits is 36, while the sum is 14.

The square root of 12312131 is about 3508.8646311877. The cubic root of 12312131 is about 230.9108868367.

Adding to 12312131 its reverse (13121321), we get a palindrome (25433452).

It can be divided in two parts, 1 and 2312131, that added together give a palindrome (2312132).

The spelling of 12312131 in words is "twelve million, three hundred twelve thousand, one hundred thirty-one".