2112920909 has 24 divisors (see below), whose sum is σ = 2406555360. Its totient is φ = 1839540000.

The previous prime is 2112920903. The next prime is 2112920933. The reversal of 2112920909 is 9090292112.

It is not a de Polignac number, because 2112920909 - 2⁴ = 2112920893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112920903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1066682 + ... + 1068660.

It is an arithmetic number, because the mean of its divisors is an integer number (100273140).

Almost surely, 2^2112920909 is an apocalyptic number.

It is an amenable number.

2112920909 is a deficient number, since it is larger than the sum of its proper divisors (293634451).

2112920909 is a wasteful number, since it uses less digits than its factorization.

2112920909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 2112920909 is about 45966.5194353455. The cubic root of 2112920909 is about 1283.2001851554.

The spelling of 2112920909 in words is "two billion, one hundred twelve million, nine hundred twenty thousand, nine hundred nine".