12131023344 has 80 divisors (see below), whose sum is σ = 34243582080. Its totient is φ = 3670030080.

The previous prime is 12131023343. The next prime is 12131023351. The reversal of 12131023344 is 44332013121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131023343) 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, 308274 + ... + 345390.

It is an arithmetic number, because the mean of its divisors is an integer number (428044776).

Almost surely, 2^12131023344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12131023344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17121791040).

12131023344 is an abundant number, since it is smaller than the sum of its proper divisors (22112558736).

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

12131023344 is a wasteful number, since it uses less digits than its factorization.

12131023344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37758 (or 37752 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12131023344 its reverse (44332013121), we get a palindrome (56463036465).

The spelling of 12131023344 in words is "twelve billion, one hundred thirty-one million, twenty-three thousand, three hundred forty-four".