21001028300 has 36 divisors (see below), whose sum is σ = 52082551920. Its totient is φ = 7200352320.

The previous prime is 21001028299. The next prime is 21001028311. The reversal of 21001028300 is 382010012.

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, 15000035 + ... + 15001434.

Almost surely, 2^21001028300 is an apocalyptic number.

21001028300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001028300 is an abundant number, since it is smaller than the sum of its proper divisors (31081523620).

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

21001028300 is a wasteful number, since it uses less digits than its factorization.

21001028300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30001490 (or 30001483 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21001028300 its reverse (382010012), we get a palindrome (21383038312).

The spelling of 21001028300 in words is "twenty-one billion, one million, twenty-eight thousand, three hundred".