12131304231 has 8 divisors (see below), whose sum is σ = 16179367680. Its totient is φ = 8085388472.

The previous prime is 12131304217. The next prime is 12131304271. The reversal of 12131304231 is 13240313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131304231 is a prime.

It is a super-2 number, since 2×12131304231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12131304198 and 12131304207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131304271) 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, 523695 + ... + 546368.

It is an arithmetic number, because the mean of its divisors is an integer number (2022420960).

Almost surely, 2^12131304231 is an apocalyptic number.

12131304231 is a deficient number, since it is larger than the sum of its proper divisors (4048063449).

12131304231 is a wasteful number, since it uses less digits than its factorization.

12131304231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073845.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 12131304231 its reverse (13240313121), we get a palindrome (25371617352).

The spelling of 12131304231 in words is "twelve billion, one hundred thirty-one million, three hundred four thousand, two hundred thirty-one".