2021120202100 has 72 divisors (see below), whose sum is σ = 4430926402560. Its totient is φ = 800165963520.

The previous prime is 2021120202083. The next prime is 2021120202181. The reversal of 2021120202100 is 12020211202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5131392 + ... + 5511208.

It is an arithmetic number, because the mean of its divisors is an integer number (61540644480).

Almost surely, 2^{2021120202100} is an apocalyptic number.

2021120202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021120202100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2215463201280).

2021120202100 is an abundant number, since it is smaller than the sum of its proper divisors (2409806200460).

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

2021120202100 is a wasteful number, since it uses less digits than its factorization.

2021120202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380377 (or 380370 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021120202100 its reverse (12020211202), we get a palindrome (2033140413302).

The spelling of 2021120202100 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred two thousand, one hundred".