21031233300 has 432 divisors, whose sum is σ = 82753786752. Its totient is φ = 4340044800.

The previous prime is 21031233283. The next prime is 21031233313. The reversal of 21031233300 is 333213012.

21031233300 is a `hidden beast` number, since 21 + 0 + 312 + 3 + 330 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 10879134 + ... + 10881066.

Almost surely, 2^21031233300 is an apocalyptic number.

21031233300 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 21031233300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41376893376).

21031233300 is an abundant number, since it is smaller than the sum of its proper divisors (61722553452).

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

21031233300 is a wasteful number, since it uses less digits than its factorization.

21031233300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21031233300 its reverse (333213012), we get a palindrome (21364446312).

The spelling of 21031233300 in words is "twenty-one billion, thirty-one million, two hundred thirty-three thousand, three hundred".