2122130909 has 2 divisors, whose sum is σ = 2122130910. Its totient is φ = 2122130908.

The previous prime is 2122130867. The next prime is 2122130993. The reversal of 2122130909 is 9090312212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1810502500 + 311628409 = 42550^2 + 17653^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122130909 - 2²⁴ = 2105353693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122130609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061065454 + 1061065455.

It is an arithmetic number, because the mean of its divisors is an integer number (1061065455).

Almost surely, 2^2122130909 is an apocalyptic number.

It is an amenable number.

2122130909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122130909 is an equidigital number, since it uses as much as digits as its factorization.

2122130909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2122130909 is about 46066.5921140255. The cubic root of 2122130909 is about 1285.0619276024.

The spelling of 2122130909 in words is "two billion, one hundred twenty-two million, one hundred thirty thousand, nine hundred nine".