2120112102209 has 4 divisors (see below), whose sum is σ = 2120130970500. Its totient is φ = 2120093233920.

The previous prime is 2120112102133. The next prime is 2120112102247. The reversal of 2120112102209 is 9022012110212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1210501651984 + 909610450225 = 1100228^2 + 953735^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120112102209 - 2⁸ = 2120112101953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120112107209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9264584 + ... + 9490665.

It is an arithmetic number, because the mean of its divisors is an integer number (530032742625).

Almost surely, 2^{2120112102209} is an apocalyptic number.

It is an amenable number.

2120112102209 is a deficient number, since it is larger than the sum of its proper divisors (18868291).

2120112102209 is a wasteful number, since it uses less digits than its factorization.

2120112102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18868290.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 2120112102209 in words is "two trillion, one hundred twenty billion, one hundred twelve million, one hundred two thousand, two hundred nine".