21333112 has 16 divisors (see below), whose sum is σ = 40851360. Its totient is φ = 10439424.

The previous prime is 21333107. The next prime is 21333133. The reversal of 21333112 is 21133312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27993 + ... + 28744.

It is an arithmetic number, because the mean of its divisors is an integer number (2553210).

Almost surely, 2^21333112 is an apocalyptic number.

It is an amenable number.

21333112 is a deficient number, since it is larger than the sum of its proper divisors (19518248).

21333112 is a wasteful number, since it uses less digits than its factorization.

21333112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56790 (or 56786 counting only the distinct ones).

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

The square root of 21333112 is about 4618.7781934187. The cubic root of 21333112 is about 277.3435505872.

Adding to 21333112 its reverse (21133312), we get a palindrome (42466424).

The spelling of 21333112 in words is "twenty-one million, three hundred thirty-three thousand, one hundred twelve".