13313201221 has 4 divisors (see below), whose sum is σ = 13314672832. Its totient is φ = 13311729612.

The previous prime is 13313201207. The next prime is 13313201227. The reversal of 13313201221 is 12210231331.

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 not a de Polignac number, because 13313201221 - 2⁷ = 13313201093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13313201227) 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, 722151 + ... + 740356.

It is an arithmetic number, because the mean of its divisors is an integer number (3328668208).

Almost surely, 2^13313201221 is an apocalyptic number.

It is an amenable number.

13313201221 is a deficient number, since it is larger than the sum of its proper divisors (1471611).

13313201221 is an equidigital number, since it uses as much as digits as its factorization.

13313201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471610.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13313201221 its reverse (12210231331), we get a palindrome (25523432552).

The spelling of 13313201221 in words is "thirteen billion, three hundred thirteen million, two hundred one thousand, two hundred twenty-one".