2120516209 has 8 divisors (see below), whose sum is σ = 2472905600. Its totient is φ = 1817585028.

The previous prime is 2120516207. The next prime is 2120516291. The reversal of 2120516209 is 9026150212.

It is not a de Polignac number, because 2120516209 - 2¹ = 2120516207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120516207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3090789 + ... + 3091474.

It is an arithmetic number, because the mean of its divisors is an integer number (309113200).

Almost surely, 2^2120516209 is an apocalyptic number.

It is an amenable number.

2120516209 is a deficient number, since it is larger than the sum of its proper divisors (352389391).

2120516209 is an frugal number, since it uses more digits than its factorization.

2120516209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182284 (or 6182270 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 2120516209 is about 46049.0630632155. The cubic root of 2120516209 is about 1284.7359162985.

The spelling of 2120516209 in words is "two billion, one hundred twenty million, five hundred sixteen thousand, two hundred nine".