12131320031 has 4 divisors (see below), whose sum is σ = 12658768752. Its totient is φ = 11603871312.

The previous prime is 12131320021. The next prime is 12131320057. The reversal of 12131320031 is 13002313121.

12131320031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12131320031 - 2¹⁰ = 12131319007 is a prime.

It is a super-2 number, since 2×12131320031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12131319991 and 12131320009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131320021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263724326 + ... + 263724371.

It is an arithmetic number, because the mean of its divisors is an integer number (3164692188).

Almost surely, 2^12131320031 is an apocalyptic number.

12131320031 is a deficient number, since it is larger than the sum of its proper divisors (527448721).

12131320031 is an equidigital number, since it uses as much as digits as its factorization.

12131320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527448720.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12131320031 its reverse (13002313121), we get a palindrome (25133633152).

The spelling of 12131320031 in words is "twelve billion, one hundred thirty-one million, three hundred twenty thousand, thirty-one".