21202300100 has 18 divisors (see below), whose sum is σ = 46008991434. Its totient is φ = 8480920000.

The previous prime is 21202300079. The next prime is 21202300123. The reversal of 21202300100 is 100320212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2888632516 + 18313667584 = 53746^2 + 135328^2 .

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, 106011401 + ... + 106011600.

Almost surely, 2^21202300100 is an apocalyptic number.

21202300100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202300100 is an abundant number, since it is smaller than the sum of its proper divisors (24806691334).

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

21202300100 is a wasteful number, since it uses less digits than its factorization.

21202300100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212023015 (or 212023008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21202300100 its reverse (100320212), we get a palindrome (21302620312).

The spelling of 21202300100 in words is "twenty-one billion, two hundred two million, three hundred thousand, one hundred".