21201222300 has 36 divisors (see below), whose sum is σ = 61342204056. Its totient is φ = 5653659200.

The previous prime is 21201222293. The next prime is 21201222313. The reversal of 21201222300 is 322210212.

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 21201222300.

It is a congruent number.

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, 35335071 + ... + 35335670.

Almost surely, 2^21201222300 is an apocalyptic number.

21201222300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201222300 is an abundant number, since it is smaller than the sum of its proper divisors (40140981756).

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

21201222300 is a wasteful number, since it uses less digits than its factorization.

21201222300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70670758 (or 70670751 counting only the distinct ones).

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

Adding to 21201222300 its reverse (322210212), we get a palindrome (21523432512).

The spelling of 21201222300 in words is "twenty-one billion, two hundred one million, two hundred twenty-two thousand, three hundred".