12013131233123 has 16 divisors (see below), whose sum is σ = 12882021890976. Its totient is φ = 11162456954880.

The previous prime is 12013131233113. The next prime is 12013131233149. The reversal of 12013131233123 is 32133213131021.

It is a cyclic number.

It is not a de Polignac number, because 12013131233123 - 2¹⁰ = 12013131232099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12013131233092 and 12013131233101.

It is not an unprimeable number, because it can be changed into a prime (12013131233113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948698 + ... + 4992623.

It is an arithmetic number, because the mean of its divisors is an integer number (805126368186).

Almost surely, 2^{12013131233123} is an apocalyptic number.

12013131233123 is a deficient number, since it is larger than the sum of its proper divisors (868890657853).

12013131233123 is a wasteful number, since it uses less digits than its factorization.

12013131233123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942854.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 12013131233123 its reverse (32133213131021), we get a palindrome (44146344364144).

The spelling of 12013131233123 in words is "twelve trillion, thirteen billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred twenty-three".