21223101300 has 72 divisors (see below), whose sum is σ = 61579766976. Its totient is φ = 5643432960.

The previous prime is 21223101253. The next prime is 21223101311. The reversal of 21223101300 is 310132212.

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 21223101300.

It is a congruent number.

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, 5697 + ... + 206103.

Almost surely, 2^21223101300 is an apocalyptic number.

21223101300 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 21223101300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30789883488).

21223101300 is an abundant number, since it is smaller than the sum of its proper divisors (40356665676).

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

21223101300 is a wasteful number, since it uses less digits than its factorization.

21223101300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200777 (or 200770 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21223101300 its reverse (310132212), we get a palindrome (21533233512).

The spelling of 21223101300 in words is "twenty-one billion, two hundred twenty-three million, one hundred one thousand, three hundred".