21202112300 has 72 divisors (see below), whose sum is σ = 46774506240. Its totient is φ = 8340270400.

The previous prime is 21202112291. The next prime is 21202112303. The reversal of 21202112300 is 321120212.

It is a happy number.

It is a super-2 number, since 2×21202112300² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202112303) 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, 2971337 + ... + 2978463.

It is an arithmetic number, because the mean of its divisors is an integer number (649645920).

Almost surely, 2^21202112300 is an apocalyptic number.

21202112300 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 21202112300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23387253120).

21202112300 is an abundant number, since it is smaller than the sum of its proper divisors (25572393940).

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

21202112300 is a wasteful number, since it uses less digits than its factorization.

21202112300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631 (or 7624 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21202112300 its reverse (321120212), we get a palindrome (21523232512).

The spelling of 21202112300 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred".