13002231221 has 12 divisors (see below), whose sum is σ = 15682947552. Its totient is φ = 10558200744.

The previous prime is 13002231217. The next prime is 13002231257. The reversal of 13002231221 is 12213220031.

It is not a de Polignac number, because 13002231221 - 2² = 13002231217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13002231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13002231421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2570135 + ... + 2575188.

It is an arithmetic number, because the mean of its divisors is an integer number (1306912296).

Almost surely, 2^13002231221 is an apocalyptic number.

It is an amenable number.

13002231221 is a deficient number, since it is larger than the sum of its proper divisors (2680716331).

13002231221 is an equidigital number, since it uses as much as digits as its factorization.

13002231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145368 (or 5145349 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13002231221 its reverse (12213220031), we get a palindrome (25215451252).

The spelling of 13002231221 in words is "thirteen billion, two million, two hundred thirty-one thousand, two hundred twenty-one".