2204222021 has 2 divisors, whose sum is σ = 2204222022. Its totient is φ = 2204222020.

The previous prime is 2204221993. The next prime is 2204222039. The reversal of 2204222021 is 1202224022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1844702500 + 359519521 = 42950^2 + 18961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204222021 - 2²⁶ = 2137113157 is a prime.

It is a super-2 number, since 2×2204222021² = 9717189435722648882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2204222071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102111010 + 1102111011.

It is an arithmetic number, because the mean of its divisors is an integer number (1102111011).

Almost surely, 2^2204222021 is an apocalyptic number.

It is an amenable number.

2204222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204222021 is an equidigital number, since it uses as much as digits as its factorization.

2204222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2204222021 is about 46949.1429208244. The cubic root of 2204222021 is about 1301.4229037405.

Adding to 2204222021 its reverse (1202224022), we get a palindrome (3406446043).

The spelling of 2204222021 in words is "two billion, two hundred four million, two hundred twenty-two thousand, twenty-one".