21033113120 has 48 divisors (see below), whose sum is σ = 51293668608. Its totient is φ = 8141848320.

The previous prime is 21033113081. The next prime is 21033113131. The reversal of 21033113120 is 2131133012.

It is a super-3 number, since 3×21033113120³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 7 ways as a sum of consecutive naturals, for example, 2115314 + ... + 2125233.

It is an arithmetic number, because the mean of its divisors is an integer number (1068618096).

Almost surely, 2^21033113120 is an apocalyptic number.

21033113120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033113120 is an abundant number, since it is smaller than the sum of its proper divisors (30260555488).

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

21033113120 is a wasteful number, since it uses less digits than its factorization.

21033113120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240593 (or 4240585 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21033113120 its reverse (2131133012), we get a palindrome (23164246132).

The spelling of 21033113120 in words is "twenty-one billion, thirty-three million, one hundred thirteen thousand, one hundred twenty".