12221233 has 2 divisors, whose sum is σ = 12221234. Its totient is φ = 12221232.

The previous prime is 12221207. The next prime is 12221243. The reversal of 12221233 is 33212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9809424 + 2411809 = 3132^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221233 - 2⁹ = 12220721 is a prime.

It is equal to p₈₀₁₆₀₁ and since 12221233 and 801601 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110616 + 6110617.

It is an arithmetic number, because the mean of its divisors is an integer number (6110617).

Almost surely, 2^12221233 is an apocalyptic number.

It is an amenable number.

12221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221233 is an equidigital number, since it uses as much as digits as its factorization.

12221233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 12221233 is about 3495.8880130805. Note that the first 3 decimals coincide. The cubic root of 12221233 is about 230.3412263380.

Adding to 12221233 its reverse (33212221), we get a palindrome (45433454).

The spelling of 12221233 in words is "twelve million, two hundred twenty-one thousand, two hundred thirty-three".