2220794221 has 2 divisors, whose sum is σ = 2220794222. Its totient is φ = 2220794220.

The previous prime is 2220794209. The next prime is 2220794239. The reversal of 2220794221 is 1224970222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2204302500 + 16491721 = 46950^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220794221 - 2⁵ = 2220794189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220794621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110397110 + 1110397111.

It is an arithmetic number, because the mean of its divisors is an integer number (1110397111).

Almost surely, 2^2220794221 is an apocalyptic number.

It is an amenable number.

2220794221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220794221 is an equidigital number, since it uses as much as digits as its factorization.

2220794221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2220794221 is about 47125.3034048588. The cubic root of 2220794221 is about 1304.6762987058.

The spelling of 2220794221 in words is "two billion, two hundred twenty million, seven hundred ninety-four thousand, two hundred twenty-one".