120102021999 has 16 divisors (see below), whose sum is σ = 178667225440. Its totient is φ = 79735777920.

The previous prime is 120102021983. The next prime is 120102022057. The reversal of 120102021999 is 999120201021.

It is not a de Polignac number, because 120102021999 - 2⁴ = 120102021983 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 (120102021499) 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, 9222172 + ... + 9235185.

It is an arithmetic number, because the mean of its divisors is an integer number (11166701590).

Almost surely, 2^120102021999 is an apocalyptic number.

120102021999 is a deficient number, since it is larger than the sum of its proper divisors (58565203441).

120102021999 is a wasteful number, since it uses less digits than its factorization.

120102021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18457607 (or 18457601 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 120102021999 in words is "one hundred twenty billion, one hundred two million, twenty-one thousand, nine hundred ninety-nine".