21113214 has 16 divisors (see below), whose sum is σ = 42662928. Its totient is φ = 6964992.

The previous prime is 21113173. The next prime is 21113221. The reversal of 21113214 is 41231112.

It is a junction number, because it is equal to n+sod(n) for n = 21113193 and 21113202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17557 + ... + 18720.

It is an arithmetic number, because the mean of its divisors is an integer number (2666433).

Almost surely, 2^21113214 is an apocalyptic number.

21113214 is an abundant number, since it is smaller than the sum of its proper divisors (21549714).

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

21113214 is a wasteful number, since it uses less digits than its factorization.

21113214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36379.

The product of its digits is 48, while the sum is 15.

The square root of 21113214 is about 4594.9117510568. The cubic root of 21113214 is about 276.3873211478.

Adding to 21113214 its reverse (41231112), we get a palindrome (62344326).

The spelling of 21113214 in words is "twenty-one million, one hundred thirteen thousand, two hundred fourteen".