2120120209 has 16 divisors (see below), whose sum is σ = 2213608320. Its totient is φ = 2028816000.

The previous prime is 2120120183. The next prime is 2120120237. The reversal of 2120120209 is 9020210212.

It is a cyclic number.

It is not a de Polignac number, because 2120120209 - 2⁹ = 2120119697 is a prime.

It is a super-2 number, since 2×2120120209² = 8989819401220407362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120120309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096974 + ... + 1098904.

It is an arithmetic number, because the mean of its divisors is an integer number (138350520).

Almost surely, 2^2120120209 is an apocalyptic number.

It is an amenable number.

2120120209 is a deficient number, since it is larger than the sum of its proper divisors (93488111).

2120120209 is a wasteful number, since it uses less digits than its factorization.

2120120209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2120120209 is about 46044.7631007045. The cubic root of 2120120209 is about 1284.6559378018.

The spelling of 2120120209 in words is "two billion, one hundred twenty million, one hundred twenty thousand, two hundred nine".