2130122009 has 2 divisors, whose sum is σ = 2130122010. Its totient is φ = 2130122008.

The previous prime is 2130121999. The next prime is 2130122021. The reversal of 2130122009 is 9002210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1122250000 + 1007872009 = 33500^2 + 31747^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130122009 - 2⁸ = 2130121753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2130122609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065061004 + 1065061005.

It is an arithmetic number, because the mean of its divisors is an integer number (1065061005).

Almost surely, 2^2130122009 is an apocalyptic number.

It is an amenable number.

2130122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130122009 is an equidigital number, since it uses as much as digits as its factorization.

2130122009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2130122009 is about 46153.2448371726. The cubic root of 2130122009 is about 1286.6729176841.

The spelling of 2130122009 in words is "two billion, one hundred thirty million, one hundred twenty-two thousand, nine".