21033121300 has 36 divisors (see below), whose sum is σ = 46191793536. Its totient is φ = 8311880800.

The previous prime is 21033121297. The next prime is 21033121349. The reversal of 21033121300 is 312133012.

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 11 ways as a sum of consecutive naturals, for example, 1258756 + ... + 1275355.

It is an arithmetic number, because the mean of its divisors is an integer number (1283105376).

Almost surely, 2^21033121300 is an apocalyptic number.

21033121300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033121300 is an abundant number, since it is smaller than the sum of its proper divisors (25158672236).

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

21033121300 is a wasteful number, since it uses less digits than its factorization.

21033121300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534208 (or 2534201 counting only the distinct ones).

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

Adding to 21033121300 its reverse (312133012), we get a palindrome (21345254312).

The spelling of 21033121300 in words is "twenty-one billion, thirty-three million, one hundred twenty-one thousand, three hundred".