21201102020200 has 24 divisors (see below), whose sum is σ = 49292562197430. Its totient is φ = 8480440808000.

The previous prime is 21201102020179. The next prime is 21201102020207. The reversal of 21201102020200 is 202020110212.

It is a happy number.

21201102020200 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 20349427749156 + 851674271044 = 4511034^2 + 922862^2 .

It is not an unprimeable number, because it can be changed into a prime (21201102020207) 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, 53002754851 + ... + 53002755250.

Almost surely, 2^{21201102020200} is an apocalyptic number.

21201102020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201102020200 is an abundant number, since it is smaller than the sum of its proper divisors (28091460177230).

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

21201102020200 is a wasteful number, since it uses less digits than its factorization.

21201102020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106005510117 (or 106005510108 counting only the distinct ones).

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

Adding to 21201102020200 its reverse (202020110212), we get a palindrome (21403122130412).

The spelling of 21201102020200 in words is "twenty-one trillion, two hundred one billion, one hundred two million, twenty thousand, two hundred".