3221004221 has 4 divisors (see below), whose sum is σ = 3221857212. Its totient is φ = 3220151232.

The previous prime is 3221004217. The next prime is 3221004257. The reversal of 3221004221 is 1224001223.

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 438441721 + 2782562500 = 20939^2 + 52750^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221004221 - 2² = 3221004217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3221004221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221004211) 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, 420806 + ... + 428391.

It is an arithmetic number, because the mean of its divisors is an integer number (805464303).

Almost surely, 2^3221004221 is an apocalyptic number.

It is an amenable number.

3221004221 is a deficient number, since it is larger than the sum of its proper divisors (852991).

3221004221 is an equidigital number, since it uses as much as digits as its factorization.

3221004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852990.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 3221004221 is about 56753.8916815402. The cubic root of 3221004221 is about 1476.8297462569.

Adding to 3221004221 its reverse (1224001223), we get a palindrome (4445005444).

The spelling of 3221004221 in words is "three billion, two hundred twenty-one million, four thousand, two hundred twenty-one".