2220017221 has 2 divisors, whose sum is σ = 2220017222. Its totient is φ = 2220017220.

The previous prime is 2220017213. The next prime is 2220017227. The reversal of 2220017221 is 1227100222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1405200196 + 814817025 = 37486^2 + 28545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220017221 - 2³ = 2220017213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220017227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110008610 + 1110008611.

It is an arithmetic number, because the mean of its divisors is an integer number (1110008611).

Almost surely, 2^2220017221 is an apocalyptic number.

It is an amenable number.

2220017221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220017221 is an equidigital number, since it uses as much as digits as its factorization.

2220017221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 2220017221 is about 47117.0587048895. The cubic root of 2220017221 is about 1304.5241231577.

Adding to 2220017221 its reverse (1227100222), we get a palindrome (3447117443).

The spelling of 2220017221 in words is "two billion, two hundred twenty million, seventeen thousand, two hundred twenty-one".