12912099 has 4 divisors (see below), whose sum is σ = 17216136. Its totient is φ = 8608064.

The previous prime is 12912073. The next prime is 12912101. The reversal of 12912099 is 99021921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12912099 - 2¹⁶ = 12846563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12912199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152014 + ... + 2152019.

It is an arithmetic number, because the mean of its divisors is an integer number (4304034).

Almost surely, 2^12912099 is an apocalyptic number.

12912099 is a deficient number, since it is larger than the sum of its proper divisors (4304037).

12912099 is an equidigital number, since it uses as much as digits as its factorization.

12912099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304036.

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

The square root of 12912099 is about 3593.3409245436. The cubic root of 12912099 is about 234.6023091080.

The spelling of 12912099 in words is "twelve million, nine hundred twelve thousand, ninety-nine".