12213841 has 2 divisors, whose sum is σ = 12213842. Its totient is φ = 12213840.

The previous prime is 12213823. The next prime is 12213857. The reversal of 12213841 is 14831221.

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., 9641025 + 2572816 = 3105^2 + 1604^2 .

It is an emirp because it is prime and its reverse (14831221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12213841 - 2⁵ = 12213809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12213821) 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, 6106920 + 6106921.

It is an arithmetic number, because the mean of its divisors is an integer number (6106921).

Almost surely, 2^12213841 is an apocalyptic number.

It is an amenable number.

12213841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213841 is an equidigital number, since it uses as much as digits as its factorization.

12213841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

The square root of 12213841 is about 3494.8306110597. The cubic root of 12213841 is about 230.2947764217.

The spelling of 12213841 in words is "twelve million, two hundred thirteen thousand, eight hundred forty-one".