14121221 has 2 divisors, whose sum is σ = 14121222. Its totient is φ = 14121220.

The previous prime is 14121167. The next prime is 14121223. The reversal of 14121221 is 12212141.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7562500 + 6558721 = 2750^2 + 2561^2 .

It is an emirp because it is prime and its reverse (12212141) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14121221 is a prime.

Together with 14121223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 14121196 and 14121205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14121223) 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 as a sum of consecutive naturals, namely, 7060610 + 7060611.

It is an arithmetic number, because the mean of its divisors is an integer number (7060611).

Almost surely, 2^14121221 is an apocalyptic number.

It is an amenable number.

14121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14121221 is an equidigital number, since it uses as much as digits as its factorization.

14121221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 14.

The square root of 14121221 is about 3757.8213102807. The cubic root of 14121221 is about 241.7078470186.

Adding to 14121221 its reverse (12212141), we get a palindrome (26333362).

The spelling of 14121221 in words is "fourteen million, one hundred twenty-one thousand, two hundred twenty-one".