14221221 has 24 divisors (see below), whose sum is σ = 22325760. Its totient is φ = 8027712.

The previous prime is 14221211. The next prime is 14221237. The reversal of 14221221 is 12212241.

It is not a de Polignac number, because 14221221 - 2⁷ = 14221093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 14221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14221211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12540 + ... + 13626.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^14221221 is an apocalyptic number.

It is an amenable number.

14221221 is a deficient number, since it is larger than the sum of its proper divisors (8104539).

14221221 is a wasteful number, since it uses less digits than its factorization.

14221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1186 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 14221221 is about 3771.1034194251. The cubic root of 14221221 is about 242.2770601353.

Adding to 14221221 its reverse (12212241), we get a palindrome (26433462).

The spelling of 14221221 in words is "fourteen million, two hundred twenty-one thousand, two hundred twenty-one".