21233231300 has 72 divisors (see below), whose sum is σ = 47004116544. Its totient is φ = 8323539840.

The previous prime is 21233231237. The next prime is 21233231309. The reversal of 21233231300 is 313233212.

It is a super-2 number, since 2×21233231300² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21233231309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1311857 + ... + 1327943.

It is an arithmetic number, because the mean of its divisors is an integer number (652834952).

Almost surely, 2^21233231300 is an apocalyptic number.

21233231300 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 21233231300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23502058272).

21233231300 is an abundant number, since it is smaller than the sum of its proper divisors (25770885244).

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

21233231300 is a wasteful number, since it uses less digits than its factorization.

21233231300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16365 (or 16358 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21233231300 its reverse (313233212), we get a palindrome (21546464512).

The spelling of 21233231300 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-one thousand, three hundred".