21241214 has 8 divisors (see below), whose sum is σ = 32040360. Its totient is φ = 10561096.

The previous prime is 21241163. The next prime is 21241217. The reversal of 21241214 is 41214212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21241192 and 21241201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29309 + ... + 30024.

It is an arithmetic number, because the mean of its divisors is an integer number (4005045).

Almost surely, 2^21241214 is an apocalyptic number.

21241214 is a deficient number, since it is larger than the sum of its proper divisors (10799146).

21241214 is a wasteful number, since it uses less digits than its factorization.

21241214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59514.

The product of its digits is 128, while the sum is 17.

The square root of 21241214 is about 4608.8191546208. The cubic root of 21241214 is about 276.9447338990.

Adding to 21241214 its reverse (41214212), we get a palindrome (62455426).

The spelling of 21241214 in words is "twenty-one million, two hundred forty-one thousand, two hundred fourteen".