2221332321 has 8 divisors (see below), whose sum is σ = 3189605440. Its totient is φ = 1366973712.

The previous prime is 2221332307. The next prime is 2221332371. The reversal of 2221332321 is 1232331222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2221332321 - 2²⁷ = 2087114593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221332371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28478581 + ... + 28478658.

It is an arithmetic number, because the mean of its divisors is an integer number (398700680).

Almost surely, 2^2221332321 is an apocalyptic number.

It is an amenable number.

2221332321 is a deficient number, since it is larger than the sum of its proper divisors (968273119).

2221332321 is a wasteful number, since it uses less digits than its factorization.

2221332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56957255.

The product of its digits is 864, while the sum is 21.

The square root of 2221332321 is about 47131.0123061239. The cubic root of 2221332321 is about 1304.7816648574.

Adding to 2221332321 its reverse (1232331222), we get a palindrome (3453663543).

The spelling of 2221332321 in words is "two billion, two hundred twenty-one million, three hundred thirty-two thousand, three hundred twenty-one".