21223030300 has 54 divisors (see below), whose sum is σ = 46482967608. Its totient is φ = 8410858560.

The previous prime is 21223030277. The next prime is 21223030303. The reversal of 21223030300 is 303032212.

It is a super-2 number, since 2×21223030300² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223030303) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1179169 + ... + 1197031.

Almost surely, 2^21223030300 is an apocalyptic number.

21223030300 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 21223030300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23241483804).

21223030300 is an abundant number, since it is smaller than the sum of its proper divisors (25259937308).

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

21223030300 is a wasteful number, since it uses less digits than its factorization.

21223030300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18095 (or 17979 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21223030300 its reverse (303032212), we get a palindrome (21526062512).

The spelling of 21223030300 in words is "twenty-one billion, two hundred twenty-three million, thirty thousand, three hundred".