12013131023 has 4 divisors (see below), whose sum is σ = 12013521168. Its totient is φ = 12012740880.

The previous prime is 12013130981. The next prime is 12013131037. The reversal of 12013131023 is 32013131021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12013131023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12013130992 and 12013131010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013131223) 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, 144518 + ... + 211923.

It is an arithmetic number, because the mean of its divisors is an integer number (3003380292).

Almost surely, 2^12013131023 is an apocalyptic number.

12013131023 is a deficient number, since it is larger than the sum of its proper divisors (390145).

12013131023 is an equidigital number, since it uses as much as digits as its factorization.

12013131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390144.

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

Adding to 12013131023 its reverse (32013131021), we get a palindrome (44026262044).

The spelling of 12013131023 in words is "twelve billion, thirteen million, one hundred thirty-one thousand, twenty-three".