12311021444 has 48 divisors (see below), whose sum is σ = 23601715200. Its totient is φ = 5593620480.

The previous prime is 12311021441. The next prime is 12311021483. The reversal of 12311021444 is 44412011321.

It is a super-2 number, since 2×12311021444² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12311021441) 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, 939989 + ... + 952995.

It is an arithmetic number, because the mean of its divisors is an integer number (491702400).

Almost surely, 2^12311021444 is an apocalyptic number.

It is an amenable number.

12311021444 is a deficient number, since it is larger than the sum of its proper divisors (11290693756).

12311021444 is a wasteful number, since it uses less digits than its factorization.

12311021444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13508 (or 13506 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12311021444 its reverse (44412011321), we get a palindrome (56723032765).

The spelling of 12311021444 in words is "twelve billion, three hundred eleven million, twenty-one thousand, four hundred forty-four".