2112131209 has 8 divisors (see below), whose sum is σ = 2129985792. Its totient is φ = 2094303120.

The previous prime is 2112131207. The next prime is 2112131243. The reversal of 2112131209 is 9021312112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112131209 - 2¹ = 2112131207 is a prime.

It is a super-2 number, since 2×2112131209² = 8922196488063603362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112131209.

It is not an unprimeable number, because it can be changed into a prime (2112131201) 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, 173992 + ... + 185734.

It is an arithmetic number, because the mean of its divisors is an integer number (266248224).

Almost surely, 2^2112131209 is an apocalyptic number.

It is an amenable number.

2112131209 is a deficient number, since it is larger than the sum of its proper divisors (17854583).

2112131209 is a wasteful number, since it uses less digits than its factorization.

2112131209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13247.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 2112131209 is about 45957.9286848309. The cubic root of 2112131209 is about 1283.0403007267.

It can be divided in two parts, 2 and 112131209, that added together give a palindrome (112131211).

The spelling of 2112131209 in words is "two billion, one hundred twelve million, one hundred thirty-one thousand, two hundred nine".