21222200300 has 72 divisors (see below), whose sum is σ = 53009940480. Its totient is φ = 7223803200.

The previous prime is 21222200249. The next prime is 21222200327. The reversal of 21222200300 is 300222212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11756 + ... + 206355.

Almost surely, 2^21222200300 is an apocalyptic number.

21222200300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222200300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26504970240).

21222200300 is an abundant number, since it is smaller than the sum of its proper divisors (31787740180).

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

21222200300 is a wasteful number, since it uses less digits than its factorization.

21222200300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218271 (or 218264 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21222200300 its reverse (300222212), we get a palindrome (21522422512).

The spelling of 21222200300 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, three hundred".