120019999 has 16 divisors (see below), whose sum is σ = 134369280. Its totient is φ = 106267360.

The previous prime is 120019987. The next prime is 120020011. The reversal of 120019999 is 999910021.

It is an interprime number because it is at equal distance from previous prime (120019987) and next prime (120020011).

It is a cyclic number.

It is not a de Polignac number, because 120019999 - 2⁷ = 120019871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120019919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138642 + ... + 139504.

It is an arithmetic number, because the mean of its divisors is an integer number (8398080).

Almost surely, 2^120019999 is an apocalyptic number.

120019999 is a deficient number, since it is larger than the sum of its proper divisors (14349281).

120019999 is a wasteful number, since it uses less digits than its factorization.

120019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 120019999 is about 10955.3639373596. The cubic root of 120019999 is about 493.2698143303.

The spelling of 120019999 in words is "one hundred twenty million, nineteen thousand, nine hundred ninety-nine".