13021131444 has 24 divisors (see below), whose sum is σ = 30515321760. Its totient is φ = 4321422624.

The previous prime is 13021131443. The next prime is 13021131491. The reversal of 13021131444 is 44413112031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021131443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2366454 + ... + 2371949.

It is an arithmetic number, because the mean of its divisors is an integer number (1271471740).

Almost surely, 2^13021131444 is an apocalyptic number.

It is an amenable number.

13021131444 is an abundant number, since it is smaller than the sum of its proper divisors (17494190316).

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

13021131444 is a wasteful number, since it uses less digits than its factorization.

13021131444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738639 (or 4738637 counting only the distinct ones).

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

Adding to 13021131444 its reverse (44413112031), we get a palindrome (57434243475).

The spelling of 13021131444 in words is "thirteen billion, twenty-one million, one hundred thirty-one thousand, four hundred forty-four".