21100100300 has 72 divisors (see below), whose sum is σ = 46704479472. Its totient is φ = 8271328000.

The previous prime is 21100100299. The next prime is 21100100323. The reversal of 21100100300 is 300100112.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6257615 + ... + 6260985.

It is an arithmetic number, because the mean of its divisors is an integer number (648673326).

Almost surely, 2^21100100300 is an apocalyptic number.

21100100300 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 21100100300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23352239736).

21100100300 is an abundant number, since it is smaller than the sum of its proper divisors (25604379172).

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

21100100300 is a wasteful number, since it uses less digits than its factorization.

21100100300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619 (or 4612 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21100100300 its reverse (300100112), we get a palindrome (21400200412).

The spelling of 21100100300 in words is "twenty-one billion, one hundred million, one hundred thousand, three hundred".