21112020000100 has 18 divisors (see below), whose sum is σ = 45813083400434. Its totient is φ = 8444808000000.

The previous prime is 21112020000047. The next prime is 21112020000179. The reversal of 21112020000100 is 100002021112.

It can be written as a sum of positive squares in 3 ways, for example, as 663156150336 + 20448863849764 = 814344^2 + 4522042^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105560099901 + ... + 105560100100.

Almost surely, 2^{21112020000100} is an apocalyptic number.

21112020000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112020000100 is an abundant number, since it is smaller than the sum of its proper divisors (24701063400334).

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

21112020000100 is a wasteful number, since it uses less digits than its factorization.

21112020000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211120200015 (or 211120200008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21112020000100 its reverse (100002021112), we get a palindrome (21212022021212).

The spelling of 21112020000100 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred", and thus it is an aban number.