13221332203220 has 48 divisors (see below), whose sum is σ = 27830708136000. Its totient is φ = 5275992234240.

The previous prime is 13221332203181. The next prime is 13221332203241. The reversal of 13221332203220 is 2230223312231.

It is a self number, because there is not a number n which added to its sum of digits gives 13221332203220.

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, 15005456 + ... + 15862104.

It is an arithmetic number, because the mean of its divisors is an integer number (579806419500).

Almost surely, 2^{13221332203220} is an apocalyptic number.

13221332203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221332203220 is an abundant number, since it is smaller than the sum of its proper divisors (14609375932780).

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

13221332203220 is a wasteful number, since it uses less digits than its factorization.

13221332203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858488 (or 858486 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 13221332203220 its reverse (2230223312231), we get a palindrome (15451555515451).

The spelling of 13221332203220 in words is "thirteen trillion, two hundred twenty-one billion, three hundred thirty-two million, two hundred three thousand, two hundred twenty".