1222222321 has 4 divisors (see below), whose sum is σ = 1225627200. Its totient is φ = 1218817444.

The previous prime is 1222222303. The next prime is 1222222333. The reversal of 1222222321 is 1232222221.

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 1222222321 - 2⁵ = 1222222289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222222121) 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, 1701901 + ... + 1702618.

It is an arithmetic number, because the mean of its divisors is an integer number (306406800).

Almost surely, 2^1222222321 is an apocalyptic number.

It is an amenable number.

1222222321 is a deficient number, since it is larger than the sum of its proper divisors (3404879).

1222222321 is an equidigital number, since it uses as much as digits as its factorization.

1222222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404878.

The product of its digits is 384, while the sum is 19.

The square root of 1222222321 is about 34960.2963517188. The cubic root of 1222222321 is about 1069.1781388016.

Adding to 1222222321 its reverse (1232222221), we get a palindrome (2454444542).

It can be divided in two parts, 12222 and 22321, that added together give a palindrome (34543).

The spelling of 1222222321 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, three hundred twenty-one".