100120209975 has 72 divisors (see below), whose sum is σ = 186064448752. Its totient is φ = 53369798400.

The previous prime is 100120209913. The next prime is 100120209991. The reversal of 100120209975 is 579902021001.

It is not a de Polignac number, because 100120209975 - 2⁸ = 100120209719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17936685 + ... + 17942265.

Almost surely, 2^100120209975 is an apocalyptic number.

100120209975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100120209975 is a deficient number, since it is larger than the sum of its proper divisors (85944238777).

100120209975 is an equidigital number, since it uses as much as digits as its factorization.

100120209975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559 (or 8542 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 100120209975 in words is "one hundred billion, one hundred twenty million, two hundred nine thousand, nine hundred seventy-five".