13221185321 has 16 divisors (see below), whose sum is σ = 14311085760. Its totient is φ = 12171539520.

The previous prime is 13221185309. The next prime is 13221185353. The reversal of 13221185321 is 12358112231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221185321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13221185371) 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, 570011 + ... + 592751.

It is an arithmetic number, because the mean of its divisors is an integer number (894442860).

Almost surely, 2^13221185321 is an apocalyptic number.

It is an amenable number.

13221185321 is a deficient number, since it is larger than the sum of its proper divisors (1089900439).

13221185321 is a wasteful number, since it uses less digits than its factorization.

13221185321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23624.

The product of its digits is 2880, while the sum is 29.

Adding to 13221185321 its reverse (12358112231), we get a palindrome (25579297552).

The spelling of 13221185321 in words is "thirteen billion, two hundred twenty-one million, one hundred eighty-five thousand, three hundred twenty-one".