100120002020 has 24 divisors (see below), whose sum is σ = 215141587584. Its totient is φ = 39116651616.

The previous prime is 100120002019. The next prime is 100120002131. The reversal of 100120002020 is 20200021001.

It is a junction number, because it is equal to n+sod(n) for n = 100120001989 and 100120002007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58208444 + ... + 58210163.

It is an arithmetic number, because the mean of its divisors is an integer number (8964232816).

Almost surely, 2^100120002020 is an apocalyptic number.

100120002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120002020 is an abundant number, since it is smaller than the sum of its proper divisors (115021585564).

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

100120002020 is a wasteful number, since it uses less digits than its factorization.

100120002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116418659 (or 116418657 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 100120002020 its reverse (20200021001), we get a palindrome (120320023021).

The spelling of 100120002020 in words is "one hundred billion, one hundred twenty million, two thousand, twenty".