21222000300 has 72 divisors (see below), whose sum is σ = 62560902096. Its totient is φ = 5552418560.

The previous prime is 21222000263. The next prime is 21222000301. The reversal of 21222000300 is 300022212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21222000301) by changing a digit.

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, 651459 + ... + 683258.

It is an arithmetic number, because the mean of its divisors is an integer number (868901418).

Almost surely, 2^21222000300 is an apocalyptic number.

21222000300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222000300 is an abundant number, since it is smaller than the sum of its proper divisors (41338901796).

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

21222000300 is a wasteful number, since it uses less digits than its factorization.

21222000300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334787 (or 1334780 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21222000300 its reverse (300022212), we get a palindrome (21522022512).

The spelling of 21222000300 in words is "twenty-one billion, two hundred twenty-two million, three hundred", and thus it is an aban number.