2021312100100 has 36 divisors (see below), whose sum is σ = 4425063629364. Its totient is φ = 801369748480.

The previous prime is 2021312100089. The next prime is 2021312100179. The reversal of 2021312100100 is 10012131202.

It can be written as a sum of positive squares in 6 ways, for example, as 335713630464 + 1685598469636 = 579408^2 + 1298306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89427289 + ... + 89449888.

It is an arithmetic number, because the mean of its divisors is an integer number (122918434149).

Almost surely, 2^{2021312100100} is an apocalyptic number.

2021312100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021312100100 is an abundant number, since it is smaller than the sum of its proper divisors (2403751529264).

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

2021312100100 is a wasteful number, since it uses less digits than its factorization.

2021312100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178877304 (or 178877297 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2021312100100 its reverse (10012131202), we get a palindrome (2031324231302).

The spelling of 2021312100100 in words is "two trillion, twenty-one billion, three hundred twelve million, one hundred thousand, one hundred".