3221311321 has 4 divisors (see below), whose sum is σ = 3228649600. Its totient is φ = 3213973044.

The previous prime is 3221311307. The next prime is 3221311343. The reversal of 3221311321 is 1231131223.

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 3221311321 - 2⁷ = 3221311193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221311021) 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, 3668481 + ... + 3669358.

It is an arithmetic number, because the mean of its divisors is an integer number (807162400).

Almost surely, 2^3221311321 is an apocalyptic number.

It is an amenable number.

3221311321 is a deficient number, since it is larger than the sum of its proper divisors (7338279).

3221311321 is an equidigital number, since it uses as much as digits as its factorization.

3221311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338278.

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

The square root of 3221311321 is about 56756.5971583921. The cubic root of 3221311321 is about 1476.8766798601.

Adding to 3221311321 its reverse (1231131223), we get a palindrome (4452442544).

It can be divided in two parts, 32213 and 11321, that added together give a palindrome (43534).

The spelling of 3221311321 in words is "three billion, two hundred twenty-one million, three hundred eleven thousand, three hundred twenty-one".