3221220121313 has 4 divisors (see below), whose sum is σ = 3222945468720. Its totient is φ = 3219494773908.

The previous prime is 3221220121309. The next prime is 3221220121321. The reversal of 3221220121313 is 3131210221223.

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 3221220121313 - 2² = 3221220121309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221220121363) 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, 862670903 + ... + 862674636.

It is an arithmetic number, because the mean of its divisors is an integer number (805736367180).

Almost surely, 2^{3221220121313} is an apocalyptic number.

It is an amenable number.

3221220121313 is a deficient number, since it is larger than the sum of its proper divisors (1725347407).

3221220121313 is a wasteful number, since it uses less digits than its factorization.

3221220121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725347406.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3221220121313 its reverse (3131210221223), we get a palindrome (6352430342536).

The spelling of 3221220121313 in words is "three trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, three hundred thirteen".