2222321021 has 2 divisors, whose sum is σ = 2222321022. Its totient is φ = 2222321020.

The previous prime is 2222320993. The next prime is 2222321041. The reversal of 2222321021 is 1201232222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763076121 + 459244900 = 41989^2 + 21430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222321021 - 2¹⁸ = 2222058877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2222321041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111160510 + 1111160511.

It is an arithmetic number, because the mean of its divisors is an integer number (1111160511).

Almost surely, 2^2222321021 is an apocalyptic number.

It is an amenable number.

2222321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222321021 is an equidigital number, since it uses as much as digits as its factorization.

2222321021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2222321021 is about 47141.4999867420. The cubic root of 2222321021 is about 1304.9752193099.

Adding to 2222321021 its reverse (1201232222), we get a palindrome (3423553243).

The spelling of 2222321021 in words is "two billion, two hundred twenty-two million, three hundred twenty-one thousand, twenty-one".