13221431310 has 32 divisors (see below), whose sum is σ = 32133104640. Its totient is φ = 3481085088.

The previous prime is 13221431309. The next prime is 13221431339. The reversal of 13221431310 is 1313412231.

It is a super-2 number, since 2×13221431310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2786962 + ... + 2791701.

It is an arithmetic number, because the mean of its divisors is an integer number (1004159520).

Almost surely, 2^13221431310 is an apocalyptic number.

13221431310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13221431310 is an abundant number, since it is smaller than the sum of its proper divisors (18911673330).

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

13221431310 is a wasteful number, since it uses less digits than its factorization.

13221431310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578752.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13221431310 its reverse (1313412231), we get a palindrome (14534843541).

The spelling of 13221431310 in words is "thirteen billion, two hundred twenty-one million, four hundred thirty-one thousand, three hundred ten".