120099 has 24 divisors (see below), whose sum is σ = 200640. Its totient is φ = 63504.

The previous prime is 120097. The next prime is 120103. The reversal of 120099 is 990021.

It is a happy number.

It is not a de Polignac number, because 120099 - 2¹ = 120097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

120099 is a modest number, since divided by 99 gives 12 as remainder.

It is not an unprimeable number, because it can be changed into a prime (120091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2772 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (8360).

2¹²⁰⁰⁹⁹ is an apocalyptic number.

120099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

120099 is a deficient number, since it is larger than the sum of its proper divisors (80541).

120099 is a wasteful number, since it uses less digits than its factorization.

120099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 120099 is about 346.5530262456. The cubic root of 120099 is about 49.3378019246.

It can be divided in two parts, 1 and 20099, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 120099 in words is "one hundred twenty thousand, ninety-nine".