12099912 has 32 divisors (see below), whose sum is σ = 33000480. Its totient is φ = 3666560.

The previous prime is 12099911. The next prime is 12099917. The reversal of 12099912 is 21999021.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12099911) 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, 22653 + ... + 23180.

It is an arithmetic number, because the mean of its divisors is an integer number (1031265).

Almost surely, 2^12099912 is an apocalyptic number.

12099912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12099912 is an abundant number, since it is smaller than the sum of its proper divisors (20900568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12099912 is a wasteful number, since it uses less digits than its factorization.

12099912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45853 (or 45849 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 12099912 is about 3478.4927770516. The cubic root of 12099912 is about 229.5764859148.

The spelling of 12099912 in words is "twelve million, ninety-nine thousand, nine hundred twelve".