21102222300 has 72 divisors (see below), whose sum is σ = 61096672896. Its totient is φ = 5623488960.

The previous prime is 21102222299. The next prime is 21102222307. The reversal of 21102222300 is 322220112.

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 21102222300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102222307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440107 + ... + 485693.

Almost surely, 2^21102222300 is an apocalyptic number.

21102222300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102222300 is an abundant number, since it is smaller than the sum of its proper divisors (39994450596).

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

21102222300 is a wasteful number, since it uses less digits than its factorization.

21102222300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47147 (or 47140 counting only the distinct ones).

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

Adding to 21102222300 its reverse (322220112), we get a palindrome (21424442412).

The spelling of 21102222300 in words is "twenty-one billion, one hundred two million, two hundred twenty-two thousand, three hundred".