21214110 has 32 divisors (see below), whose sum is σ = 51035040. Its totient is φ = 5643648.

The previous prime is 21214087. The next prime is 21214111. The reversal of 21214110 is 1141212.

It is a happy number.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24444 + ... + 25296.

It is an arithmetic number, because the mean of its divisors is an integer number (1594845).

Almost surely, 2^21214110 is an apocalyptic number.

21214110 is an abundant number, since it is smaller than the sum of its proper divisors (29820930).

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

21214110 is a wasteful number, since it uses less digits than its factorization.

21214110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

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

The square root of 21214110 is about 4605.8777665066. The cubic root of 21214110 is about 276.8268890175.

Adding to 21214110 its reverse (1141212), we get a palindrome (22355322).

The spelling of 21214110 in words is "twenty-one million, two hundred fourteen thousand, one hundred ten".