21100220300 has 36 divisors (see below), whose sum is σ = 45987473280. Its totient is φ = 8403222720.

The previous prime is 21100220291. The next prime is 21100220329. The reversal of 21100220300 is 302200112.

It is a happy number.

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, 437804 + ... + 483603.

Almost surely, 2^21100220300 is an apocalyptic number.

21100220300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100220300 is an abundant number, since it is smaller than the sum of its proper divisors (24887252980).

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

21100220300 is a wasteful number, since it uses less digits than its factorization.

21100220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921650 (or 921643 counting only the distinct ones).

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

Adding to 21100220300 its reverse (302200112), we get a palindrome (21402420412).

The spelling of 21100220300 in words is "twenty-one billion, one hundred million, two hundred twenty thousand, three hundred".