21233112 has 32 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 7059104.

The previous prime is 21233111. The next prime is 21233123. The reversal of 21233112 is 21133212.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21233091 and 21233100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10573 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^21233112 is an apocalyptic number.

It is an amenable number.

21233112 is an abundant number, since it is smaller than the sum of its proper divisors (31989288).

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

21233112 is a wasteful number, since it uses less digits than its factorization.

21233112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335 (or 2331 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 21233112 is about 4607.9401037774. The cubic root of 21233112 is about 276.9095179021.

Adding to 21233112 its reverse (21133212), we get a palindrome (42366324).

The spelling of 21233112 in words is "twenty-one million, two hundred thirty-three thousand, one hundred twelve".