2222221009 has 2 divisors, whose sum is σ = 2222221010. Its totient is φ = 2222221008.

The previous prime is 2222221007. The next prime is 2222221063. The reversal of 2222221009 is 9001222222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269140625 + 953080384 = 35625^2 + 30872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222221009 - 2¹ = 2222221007 is a prime.

Together with 2222221007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2222221007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111110504 + 1111110505.

It is an arithmetic number, because the mean of its divisors is an integer number (1111110505).

Almost surely, 2^2222221009 is an apocalyptic number.

It is an amenable number.

2222221009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222221009 is an equidigital number, since it uses as much as digits as its factorization.

2222221009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2222221009 is about 47140.4392109365. The cubic root of 2222221009 is about 1304.9556429094.

The spelling of 2222221009 in words is "two billion, two hundred twenty-two million, two hundred twenty-one thousand, nine".