100020200120 has 32 divisors (see below), whose sum is σ = 225160974720. Its totient is φ = 39987542400.

The previous prime is 100020200107. The next prime is 100020200131. The reversal of 100020200120 is 21002020001.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 100020200098 and 100020200107.

It is a congruent number.

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, 562787 + ... + 718866.

It is an arithmetic number, because the mean of its divisors is an integer number (7036280460).

Almost surely, 2^100020200120 is an apocalyptic number.

100020200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020200120 is an abundant number, since it is smaller than the sum of its proper divisors (125140774600).

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

100020200120 is a wasteful number, since it uses less digits than its factorization.

100020200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283615 (or 1283611 counting only the distinct ones).

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

Adding to 100020200120 its reverse (21002020001), we get a palindrome (121022220121).

The spelling of 100020200120 in words is "one hundred billion, twenty million, two hundred thousand, one hundred twenty".