21241110 has 64 divisors (see below), whose sum is σ = 56070144. Its totient is φ = 5107200.

The previous prime is 21241093. The next prime is 21241123. The reversal of 21241110 is 1114212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62862 + ... + 63198.

It is an arithmetic number, because the mean of its divisors is an integer number (876096).

Almost surely, 2^21241110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21241110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28035072).

21241110 is an abundant number, since it is smaller than the sum of its proper divisors (34829034).

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

21241110 is a wasteful number, since it uses less digits than its factorization.

21241110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

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

The square root of 21241110 is about 4608.8078718905. The cubic root of 21241110 is about 276.9442819114.

Adding to 21241110 its reverse (1114212), we get a palindrome (22355322).

The spelling of 21241110 in words is "twenty-one million, two hundred forty-one thousand, one hundred ten".