21033231300 has 108 divisors (see below), whose sum is σ = 69805633716. Its totient is φ = 5278924800.

The previous prime is 21033231293. The next prime is 21033231341. The reversal of 21033231300 is 313233012.

21033231300 is a `hidden beast` number, since 2 + 1 + 0 + 332 + 31 + 300 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 636250176 + 20396981124 = 25224^2 + 142818^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 672061 + ... + 702660.

Almost surely, 2^21033231300 is an apocalyptic number.

21033231300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033231300 is an abundant number, since it is smaller than the sum of its proper divisors (48772402416).

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

21033231300 is a wasteful number, since it uses less digits than its factorization.

21033231300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374758 (or 1374748 counting only the distinct ones).

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

Adding to 21033231300 its reverse (313233012), we get a palindrome (21346464312).

The spelling of 21033231300 in words is "twenty-one billion, thirty-three million, two hundred thirty-one thousand, three hundred".