21214112 has 12 divisors (see below), whose sum is σ = 41765346. Its totient is φ = 10607040.

The previous prime is 21214111. The next prime is 21214117. The reversal of 21214112 is 21141212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20757136 + 456976 = 4556^2 + 676^2 .

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (21214111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331439 + ... + 331502.

Almost surely, 2^21214112 is an apocalyptic number.

It is an amenable number.

21214112 is a deficient number, since it is larger than the sum of its proper divisors (20551234).

21214112 is an equidigital number, since it uses as much as digits as its factorization.

21214112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662951 (or 662943 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 21214112 is about 4605.8779836205. The cubic root of 21214112 is about 276.8268977169.

Adding to 21214112 its reverse (21141212), we get a palindrome (42355324).

Subtracting from 21214112 its reverse (21141212), we obtain a square (72900 = 270²).

The spelling of 21214112 in words is "twenty-one million, two hundred fourteen thousand, one hundred twelve".