22221021300 has 72 divisors (see below), whose sum is σ = 68074767936. Its totient is φ = 5577039360.

The previous prime is 22221021293. The next prime is 22221021331. The reversal of 22221021300 is 312012222.

It is a happy number.

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 22221021300.

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, 2173432 + ... + 2183631.

It is an arithmetic number, because the mean of its divisors is an integer number (945482888).

Almost surely, 2^22221021300 is an apocalyptic number.

22221021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221021300 is an abundant number, since it is smaller than the sum of its proper divisors (45853746636).

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

22221021300 is a wasteful number, since it uses less digits than its factorization.

22221021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357097 (or 4357090 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22221021300 its reverse (312012222), we get a palindrome (22533033522).

The spelling of 22221021300 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, three hundred".