21110214 has 16 divisors (see below), whose sum is σ = 42290928. Its totient is φ = 7024992.

The previous prime is 21110189. The next prime is 21110227. The reversal of 21110214 is 41201112.

It is a happy number.

It is a super-2 number, since 2×21110214² = 891282270251592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21110214.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 6660.

It is an arithmetic number, because the mean of its divisors is an integer number (2643183).

Almost surely, 2^21110214 is an apocalyptic number.

21110214 is an abundant number, since it is smaller than the sum of its proper divisors (21180714).

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

21110214 is a wasteful number, since it uses less digits than its factorization.

21110214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5879.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21110214 is about 4594.5852914055. The cubic root of 21110214 is about 276.3742298007.

Adding to 21110214 its reverse (41201112), we get a palindrome (62311326).

The spelling of 21110214 in words is "twenty-one million, one hundred ten thousand, two hundred fourteen".