2100020100120 has 48 divisors (see below), whose sum is σ = 6825065326560. Its totient is φ = 560005359936.

The previous prime is 2100020100077. The next prime is 2100020100179. The reversal of 2100020100120 is 210010200012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2916694224 + ... + 2916694943.

It is an arithmetic number, because the mean of its divisors is an integer number (142188860970).

Almost surely, 2^{2100020100120} is an apocalyptic number.

2100020100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100020100120 is an abundant number, since it is smaller than the sum of its proper divisors (4725045226440).

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

2100020100120 is a wasteful number, since it uses less digits than its factorization.

2100020100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833389184 (or 5833389177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100020100120 its reverse (210010200012), we get a palindrome (2310030300132).

The spelling of 2100020100120 in words is "two trillion, one hundred billion, twenty million, one hundred thousand, one hundred twenty".