3221131321 has 4 divisors (see below), whose sum is σ = 3410609652.
Its totient is φ = 3031652992.
The previous prime is 3221131307. The next prime is 3221131363. The reversal of 3221131321 is 1231311223.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 2506103721 + 715027600 = 50061^2 + 26740^2
It is a cyclic number.
It is not a de Polignac number, because 3221131321 - 227 = 3086913593 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (3221131391) 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, 94739140 + ... + 94739173.
It is an arithmetic number, because the mean of its divisors is an integer number (852652413).
Almost surely, 23221131321 is an apocalyptic number.
It is an amenable number.
3221131321 is a deficient number, since it is larger than the sum of its proper divisors (189478331).
3221131321 is a wasteful number, since it uses less digits than its factorization.
3221131321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 189478330.
The product of its digits is 216, while the sum is 19.
The square root of 3221131321 is about 56755.0114174951.
The cubic root of 3221131321 is about 1476.8491711090.
Adding to 3221131321 its reverse (1231311223), we get a palindrome (4452442544).
The spelling of 3221131321 in words is "three billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-one".