21200102300 has 72 divisors (see below), whose sum is σ = 49802979072. Its totient is φ = 7786656000.

The previous prime is 21200102299. The next prime is 21200102311. The reversal of 21200102300 is 320100212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205610 + ... + 290990.

Almost surely, 2^21200102300 is an apocalyptic number.

21200102300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200102300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24901489536).

21200102300 is an abundant number, since it is smaller than the sum of its proper divisors (28602876772).

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

21200102300 is a wasteful number, since it uses less digits than its factorization.

21200102300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85599 (or 85592 counting only the distinct ones).

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

Adding to 21200102300 its reverse (320100212), we get a palindrome (21520202512).

The spelling of 21200102300 in words is "twenty-one billion, two hundred million, one hundred two thousand, three hundred".