12131311031 has 4 divisors (see below), whose sum is σ = 13864355472. Its totient is φ = 10398266592.

The previous prime is 12131311013. The next prime is 12131311043. The reversal of 12131311031 is 13011313121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13011313121 = 373 ⋅34882877.

It is not a de Polignac number, because 12131311031 - 2⁶ = 12131310967 is a prime.

It is a super-2 number, since 2×12131311031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131311531) 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, 866522210 + ... + 866522223.

It is an arithmetic number, because the mean of its divisors is an integer number (3466088868).

Almost surely, 2^12131311031 is an apocalyptic number.

12131311031 is a deficient number, since it is larger than the sum of its proper divisors (1733044441).

12131311031 is an equidigital number, since it uses as much as digits as its factorization.

12131311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733044440.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 12131311031 its reverse (13011313121), we get a palindrome (25142624152).

The spelling of 12131311031 in words is "twelve billion, one hundred thirty-one million, three hundred eleven thousand, thirty-one".