12031013131 has 4 divisors (see below), whose sum is σ = 12031243792. Its totient is φ = 12030782472.

The previous prime is 12031013087. The next prime is 12031013153. The reversal of 12031013131 is 13131013021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13131013021 = 7 ⋅1875859003.

It is a cyclic number.

It is not a de Polignac number, because 12031013131 - 2¹³ = 12031004939 is a prime.

It is a super-2 number, since 2×12031013131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031013531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210 + ... + 155176.

It is an arithmetic number, because the mean of its divisors is an integer number (3007810948).

Almost surely, 2^12031013131 is an apocalyptic number.

12031013131 is a deficient number, since it is larger than the sum of its proper divisors (230661).

12031013131 is an equidigital number, since it uses as much as digits as its factorization.

12031013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230660.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 12031013131 its reverse (13131013021), we get a palindrome (25162026152).

The spelling of 12031013131 in words is "twelve billion, thirty-one million, thirteen thousand, one hundred thirty-one".