123312099 has 4 divisors (see below), whose sum is σ = 164416136. Its totient is φ = 82208064.

The previous prime is 123312061. The next prime is 123312103. The reversal of 123312099 is 990213321.

It is a happy number.

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

It is not a de Polignac number, because 123312099 - 2²⁰ = 122263523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123312029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20552014 + ... + 20552019.

It is an arithmetic number, because the mean of its divisors is an integer number (41104034).

Almost surely, 2^123312099 is an apocalyptic number.

123312099 is a deficient number, since it is larger than the sum of its proper divisors (41104037).

123312099 is an equidigital number, since it uses as much as digits as its factorization.

123312099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41104036.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 123312099 is about 11104.5981016874. The cubic root of 123312099 is about 497.7392588382.

The spelling of 123312099 in words is "one hundred twenty-three million, three hundred twelve thousand, ninety-nine".