2021100202100 has 54 divisors (see below), whose sum is σ = 5101834379670. Its totient is φ = 692948639040.

The previous prime is 2021100202087. The next prime is 2021100202127. The reversal of 2021100202100 is 12020011202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 98318619364 + 1922781582736 = 313558^2 + 1386644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 206229815 + ... + 206239614.

Almost surely, 2^{2021100202100} is an apocalyptic number.

2021100202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021100202100 is an abundant number, since it is smaller than the sum of its proper divisors (3080734177570).

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

2021100202100 is a wasteful number, since it uses less digits than its factorization.

2021100202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412469457 (or 412469443 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021100202100 its reverse (12020011202), we get a palindrome (2033120213302).

The spelling of 2021100202100 in words is "two trillion, twenty-one billion, one hundred million, two hundred two thousand, one hundred".