100121999980 has 24 divisors (see below), whose sum is σ = 210397658688. Its totient is φ = 40021855488.

The previous prime is 100121999947. The next prime is 100122000007. The reversal of 100121999980 is 89999121001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653549 + ... + 1713028.

It is an arithmetic number, because the mean of its divisors is an integer number (8766569112).

Almost surely, 2^100121999980 is an apocalyptic number.

100121999980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121999980 is an abundant number, since it is smaller than the sum of its proper divisors (110275658708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100121999980 is a wasteful number, since it uses less digits than its factorization.

100121999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368073 (or 3368071 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 100121999980 in words is "one hundred billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred eighty".