21033120300 has 72 divisors (see below), whose sum is σ = 60919600896. Its totient is φ = 5602954560.

The previous prime is 21033120299. The next prime is 21033120347. The reversal of 21033120300 is 302133012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21033120300.

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 23 ways as a sum of consecutive naturals, for example, 253849 + ... + 326351.

It is an arithmetic number, because the mean of its divisors is an integer number (846105568).

Almost surely, 2^21033120300 is an apocalyptic number.

21033120300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033120300 is an abundant number, since it is smaller than the sum of its proper divisors (39886480596).

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

21033120300 is a wasteful number, since it uses less digits than its factorization.

21033120300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73487 (or 73480 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21033120300 its reverse (302133012), we get a palindrome (21335253312).

The spelling of 21033120300 in words is "twenty-one billion, thirty-three million, one hundred twenty thousand, three hundred".