2204456021 has 2 divisors, whose sum is σ = 2204456022. Its totient is φ = 2204456020.

The previous prime is 2204455991. The next prime is 2204456029. The reversal of 2204456021 is 1206544022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1788867025 + 415588996 = 42295^2 + 20386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204456021 - 2¹⁸ = 2204193877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2204456029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102228010 + 1102228011.

It is an arithmetic number, because the mean of its divisors is an integer number (1102228011).

Almost surely, 2^2204456021 is an apocalyptic number.

It is an amenable number.

2204456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204456021 is an equidigital number, since it uses as much as digits as its factorization.

2204456021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2204456021 is about 46951.6349129612. The cubic root of 2204456021 is about 1301.4689550882.

The spelling of 2204456021 in words is "two billion, two hundred four million, four hundred fifty-six thousand, twenty-one".