21033112000 has 56 divisors (see below), whose sum is σ = 52088521680. Its totient is φ = 8413241600.

The previous prime is 21033111991. The next prime is 21033112031. The reversal of 21033112000 is 21133012.

It is a congruent number.

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, 1306570 + ... + 1322569.

Almost surely, 2^21033112000 is an apocalyptic number.

21033112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033112000 is an abundant number, since it is smaller than the sum of its proper divisors (31055409680).

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

21033112000 is an equidigital number, since it uses as much as digits as its factorization.

21033112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629166 (or 2629146 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21033112000 its reverse (21133012), we get a palindrome (21054245012).

The spelling of 21033112000 in words is "twenty-one billion, thirty-three million, one hundred twelve thousand".