2221112009 has 2 divisors, whose sum is σ = 2221112010. Its totient is φ = 2221112008.

The previous prime is 2221111993. The next prime is 2221112021. The reversal of 2221112009 is 9002111222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1752259600 + 468852409 = 41860^2 + 21653^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221112009 - 2⁴ = 2221111993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221112039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110556004 + 1110556005.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556005).

Almost surely, 2^2221112009 is an apocalyptic number.

It is an amenable number.

2221112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221112009 is an equidigital number, since it uses as much as digits as its factorization.

2221112009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2221112009 is about 47128.6750185065. The cubic root of 2221112009 is about 1304.7385272984.

The spelling of 2221112009 in words is "two billion, two hundred twenty-one million, one hundred twelve thousand, nine".