21213300300 has 36 divisors (see below), whose sum is σ = 61377149736. Its totient is φ = 5656880000.

The previous prime is 21213300299. The next prime is 21213300319. The reversal of 21213300300 is 300331212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21213300300.

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, 35355201 + ... + 35355800.

It is an arithmetic number, because the mean of its divisors is an integer number (1704920826).

Almost surely, 2^21213300300 is an apocalyptic number.

21213300300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213300300 is an abundant number, since it is smaller than the sum of its proper divisors (40163849436).

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

21213300300 is a wasteful number, since it uses less digits than its factorization.

21213300300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70711018 (or 70711011 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21213300300 its reverse (300331212), we get a palindrome (21513631512).

The spelling of 21213300300 in words is "twenty-one billion, two hundred thirteen million, three hundred thousand, three hundred".