2021100210120 has 32 divisors (see below), whose sum is σ = 6063300630720. Its totient is φ = 538960056000.

The previous prime is 2021100210113. The next prime is 2021100210221. The reversal of 2021100210120 is 210120011202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021100210096 and 2021100210105.

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, 8421250756 + ... + 8421250995.

It is an arithmetic number, because the mean of its divisors is an integer number (189478144710).

Almost surely, 2^{2021100210120} is an apocalyptic number.

2021100210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021100210120 is an abundant number, since it is smaller than the sum of its proper divisors (4042200420600).

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

2021100210120 is a wasteful number, since it uses less digits than its factorization.

2021100210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16842501765 (or 16842501761 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021100210120 its reverse (210120011202), we get a palindrome (2231220221322).

The spelling of 2021100210120 in words is "two trillion, twenty-one billion, one hundred million, two hundred ten thousand, one hundred twenty".