2109812999 has 24 divisors (see below), whose sum is σ = 2571579360. Its totient is φ = 1695269376.

The previous prime is 2109812993. The next prime is 2109813007. The reversal of 2109812999 is 9992189012.

It is not a de Polignac number, because 2109812999 - 2⁴ = 2109812983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109812993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 542249 + ... + 546125.

It is an arithmetic number, because the mean of its divisors is an integer number (107149140).

Almost surely, 2^2109812999 is an apocalyptic number.

2109812999 is a deficient number, since it is larger than the sum of its proper divisors (461766361).

2109812999 is a wasteful number, since it uses less digits than its factorization.

2109812999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 4170 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 2109812999 is about 45932.7007588276. The cubic root of 2109812999 is about 1282.5707204130.

The spelling of 2109812999 in words is "two billion, one hundred nine million, eight hundred twelve thousand, nine hundred ninety-nine".