2021021202100 has 36 divisors (see below), whose sum is σ = 4387866619500. Its totient is φ = 807993621760.

The previous prime is 2021021202097. The next prime is 2021021202119. The reversal of 2021021202100 is 12021201202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 148272743844 + 1872748458256 = 385062^2 + 1368484^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4989865 + ... + 5379664.

It is an arithmetic number, because the mean of its divisors is an integer number (121885183875).

Almost surely, 2^{2021021202100} is an apocalyptic number.

2021021202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021021202100 is an abundant number, since it is smaller than the sum of its proper divisors (2366845417400).

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

2021021202100 is a wasteful number, since it uses less digits than its factorization.

2021021202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371492 (or 10371485 counting only the distinct ones).

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

Adding to 2021021202100 its reverse (12021201202), we get a palindrome (2033042403302).

The spelling of 2021021202100 in words is "two trillion, twenty-one billion, twenty-one million, two hundred two thousand, one hundred".