12131323344 has 100 divisors (see below), whose sum is σ = 40127537824. Its totient is φ = 3466089792.

The previous prime is 12131323327. The next prime is 12131323349. The reversal of 12131323344 is 44332313121.

It is a happy number.

12131323344 is a `hidden beast` number, since 1 + 2 + 1 + 313 + 2 + 3 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131323349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 659542 + ... + 677685.

Almost surely, 2^12131323344 is an apocalyptic number.

12131323344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12131323344 is an abundant number, since it is smaller than the sum of its proper divisors (27996214480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131323344 is a wasteful number, since it uses less digits than its factorization.

12131323344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337254 (or 1337239 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 12131323344 its reverse (44332313121), we get a palindrome (56463636465).

The spelling of 12131323344 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred forty-four".