12113221 has 2 divisors, whose sum is σ = 12113222. Its totient is φ = 12113220.

The previous prime is 12113209. The next prime is 12113251. The reversal of 12113221 is 12231121.

12113221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6305121 + 5808100 = 2511^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12113221 - 2⁷ = 12113093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12113201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056610 + 6056611.

It is an arithmetic number, because the mean of its divisors is an integer number (6056611).

Almost surely, 2^12113221 is an apocalyptic number.

It is an amenable number.

12113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12113221 is an equidigital number, since it uses as much as digits as its factorization.

12113221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 13.

The square root of 12113221 is about 3480.4052924911. The cubic root of 12113221 is about 229.6606274051.

Adding to 12113221 its reverse (12231121), we get a palindrome (24344342).

The spelling of 12113221 in words is "twelve million, one hundred thirteen thousand, two hundred twenty-one".