21112021100200 has 24 divisors (see below), whose sum is σ = 49085449058430. Its totient is φ = 8444808440000.

The previous prime is 21112021100173. The next prime is 21112021100207. The reversal of 21112021100200 is 200112021112.

It can be written as a sum of positive squares in 3 ways, for example, as 11629723216644 + 9482297883556 = 3410238^2 + 3079334^2 .

It is not an unprimeable number, because it can be changed into a prime (21112021100207) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 52780052551 + ... + 52780052950.

Almost surely, 2^{21112021100200} is an apocalyptic number.

21112021100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112021100200 is an abundant number, since it is smaller than the sum of its proper divisors (27973427958230).

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

21112021100200 is a wasteful number, since it uses less digits than its factorization.

21112021100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105560105517 (or 105560105508 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112021100200 its reverse (200112021112), we get a palindrome (21312133121312).

The spelling of 21112021100200 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred thousand, two hundred".