13144331321 has 4 divisors (see below), whose sum is σ = 14339270544. Its totient is φ = 11949392100.

The previous prime is 13144331311. The next prime is 13144331323. The reversal of 13144331321 is 12313344131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13144331321 - 2¹⁸ = 13144069177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13144331323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597469595 + ... + 597469616.

It is an arithmetic number, because the mean of its divisors is an integer number (3584817636).

Almost surely, 2^13144331321 is an apocalyptic number.

13144331321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13144331321 is a deficient number, since it is larger than the sum of its proper divisors (1194939223).

13144331321 is a wasteful number, since it uses less digits than its factorization.

13144331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194939222.

The product of its digits is 2592, while the sum is 26.

Adding to 13144331321 its reverse (12313344131), we get a palindrome (25457675452).

The spelling of 13144331321 in words is "thirteen billion, one hundred forty-four million, three hundred thirty-one thousand, three hundred twenty-one".