12312231144 has 64 divisors (see below), whose sum is σ = 31478803200. Its totient is φ = 4011561216.

The previous prime is 12312231143. The next prime is 12312231193. The reversal of 12312231144 is 44113221321.

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

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

It is not an unprimeable number, because it can be changed into a prime (12312231143) 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, 324177 + ... + 360159.

It is an arithmetic number, because the mean of its divisors is an integer number (491856300).

Almost surely, 2^12312231144 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 12312231144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15739401600).

12312231144 is an abundant number, since it is smaller than the sum of its proper divisors (19166572056).

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

12312231144 is a wasteful number, since it uses less digits than its factorization.

12312231144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36314 (or 36310 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 12312231144 its reverse (44113221321), we get a palindrome (56425452465).

The spelling of 12312231144 in words is "twelve billion, three hundred twelve million, two hundred thirty-one thousand, one hundred forty-four".