21012202300 has 72 divisors (see below), whose sum is σ = 49943522160. Its totient is φ = 7637683200.

The previous prime is 21012202273. The next prime is 21012202333. The reversal of 21012202300 is 320221012.

It is a super-2 number, since 2×21012202300² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 163806 + ... + 262405.

It is an arithmetic number, because the mean of its divisors is an integer number (693660030).

Almost surely, 2^21012202300 is an apocalyptic number.

21012202300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012202300 is an abundant number, since it is smaller than the sum of its proper divisors (28931319860).

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

21012202300 is a wasteful number, since it uses less digits than its factorization.

21012202300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426271 (or 426264 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21012202300 its reverse (320221012), we get a palindrome (21332423312).

The spelling of 21012202300 in words is "twenty-one billion, twelve million, two hundred two thousand, three hundred".