120002100991 has 8 divisors (see below), whose sum is σ = 120960057344. Its totient is φ = 119044348920.

The previous prime is 120002100983. The next prime is 120002100997. The reversal of 120002100991 is 199001200021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120002100991 - 2³ = 120002100983 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 (120002100997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262626 + ... + 1354336.

It is an arithmetic number, because the mean of its divisors is an integer number (15120007168).

Almost surely, 2^120002100991 is an apocalyptic number.

120002100991 is a deficient number, since it is larger than the sum of its proper divisors (957956353).

120002100991 is a wasteful number, since it uses less digits than its factorization.

120002100991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102141.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 120002100991 in words is "one hundred twenty billion, two million, one hundred thousand, nine hundred ninety-one".