21233133300 has 144 divisors (see below), whose sum is σ = 63029215872. Its totient is φ = 5515622400.

The previous prime is 21233133287. The next prime is 21233133301. The reversal of 21233133300 is 333133212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233133301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14673177 + ... + 14674623.

It is an arithmetic number, because the mean of its divisors is an integer number (437702888).

Almost surely, 2^21233133300 is an apocalyptic number.

21233133300 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 21233133300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31514607936).

21233133300 is an abundant number, since it is smaller than the sum of its proper divisors (41796082572).

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

21233133300 is a wasteful number, since it uses less digits than its factorization.

21233133300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21233133300 its reverse (333133212), we get a palindrome (21566266512).

The spelling of 21233133300 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-three thousand, three hundred".