2110131209 has 4 divisors (see below), whose sum is σ = 2117333316. Its totient is φ = 2102929104.

The previous prime is 2110131187. The next prime is 2110131227. The reversal of 2110131209 is 9021310112.

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 1115359609 + 994771600 = 33397^2 + 31540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110131209 - 2²⁸ = 1841695753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2110131809) 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, 3600614 + ... + 3601199.

It is an arithmetic number, because the mean of its divisors is an integer number (529333329).

Almost surely, 2^2110131209 is an apocalyptic number.

It is an amenable number.

2110131209 is a deficient number, since it is larger than the sum of its proper divisors (7202107).

2110131209 is an equidigital number, since it uses as much as digits as its factorization.

2110131209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202106.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 2110131209 is about 45936.1645003150. The cubic root of 2110131209 is about 1282.6351978987.

The spelling of 2110131209 in words is "two billion, one hundred ten million, one hundred thirty-one thousand, two hundred nine".