21113220300 has 216 divisors, whose sum is σ = 64760521728. Its totient is φ = 5300803200.

The previous prime is 21113220281. The next prime is 21113220319. The reversal of 21113220300 is 302231112.

It is an interprime number because it is at equal distance from previous prime (21113220281) and next prime (21113220319).

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 21113220300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 34782597 + ... + 34783203.

Almost surely, 2^21113220300 is an apocalyptic number.

21113220300 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 21113220300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32380260864).

21113220300 is an abundant number, since it is smaller than the sum of its proper divisors (43647301428).

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

21113220300 is a wasteful number, since it uses less digits than its factorization.

21113220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21113220300 its reverse (302231112), we get a palindrome (21415451412).

The spelling of 21113220300 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty thousand, three hundred".