13220201321 has 4 divisors (see below), whose sum is σ = 13221709200. Its totient is φ = 13218693444.

The previous prime is 13220201237. The next prime is 13220201329. The reversal of 13220201321 is 12310202231.

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 a de Polignac number, because none of the positive numbers 2^k-13220201321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13220201321.

It is not an unprimeable number, because it can be changed into a prime (13220201329) 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, 740711 + ... + 758348.

It is an arithmetic number, because the mean of its divisors is an integer number (3305427300).

Almost surely, 2^13220201321 is an apocalyptic number.

It is an amenable number.

13220201321 is a deficient number, since it is larger than the sum of its proper divisors (1507879).

13220201321 is an equidigital number, since it uses as much as digits as its factorization.

13220201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507878.

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

Adding to 13220201321 its reverse (12310202231), we get a palindrome (25530403552).

The spelling of 13220201321 in words is "thirteen billion, two hundred twenty million, two hundred one thousand, three hundred twenty-one".