21012133300 has 18 divisors (see below), whose sum is σ = 45596329478. Its totient is φ = 8404853280.

The previous prime is 21012133273. The next prime is 21012133313. The reversal of 21012133300 is 333121012.

It can be written as a sum of positive squares in 3 ways, for example, as 687068944 + 20325064356 = 26212^2 + 142566^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105060567 + ... + 105060766.

Almost surely, 2^21012133300 is an apocalyptic number.

21012133300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012133300 is an abundant number, since it is smaller than the sum of its proper divisors (24584196178).

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

21012133300 is a wasteful number, since it uses less digits than its factorization.

21012133300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210121347 (or 210121340 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21012133300 its reverse (333121012), we get a palindrome (21345254312).

The spelling of 21012133300 in words is "twenty-one billion, twelve million, one hundred thirty-three thousand, three hundred".