123321199 has 4 divisors (see below), whose sum is σ = 125342920. Its totient is φ = 121299480.

The previous prime is 123321197. The next prime is 123321203. The reversal of 123321199 is 991123321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991123321 = 6067 ⋅163363.

It is a cyclic number.

It is not a de Polignac number, because 123321199 - 2¹ = 123321197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123321199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321197) 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 3 ways as a sum of consecutive naturals, for example, 1010769 + ... + 1010890.

It is an arithmetic number, because the mean of its divisors is an integer number (31335730).

Almost surely, 2^123321199 is an apocalyptic number.

123321199 is a deficient number, since it is larger than the sum of its proper divisors (2021721).

123321199 is an equidigital number, since it uses as much as digits as its factorization.

123321199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021720.

The product of its digits is 2916, while the sum is 31.

The square root of 123321199 is about 11105.0078343061. The cubic root of 123321199 is about 497.7515023403.

It can be divided in two parts, 12332 and 1199, that added together give a palindrome (13531).

The spelling of 123321199 in words is "one hundred twenty-three million, three hundred twenty-one thousand, one hundred ninety-nine".