2021111020100 has 36 divisors (see below), whose sum is σ = 4386354596484. Its totient is φ = 808344190080.

The previous prime is 2021111020081. The next prime is 2021111020151. The reversal of 2021111020100 is 10201111202.

It can be written as a sum of positive squares in 6 ways, for example, as 34116306436 + 1986994713664 = 184706^2 + 1409608^2 .

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, 439379 + ... + 2057978.

Almost surely, 2^{2021111020100} is an apocalyptic number.

2021111020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021111020100 is an abundant number, since it is smaller than the sum of its proper divisors (2365243576384).

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

2021111020100 is a wasteful number, since it uses less digits than its factorization.

2021111020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505464 (or 2505457 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2021111020100 its reverse (10201111202), we get a palindrome (2031312131302).

The spelling of 2021111020100 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty thousand, one hundred".