12221171 has 2 divisors, whose sum is σ = 12221172. Its totient is φ = 12221170.

The previous prime is 12221117. The next prime is 12221173. The reversal of 12221171 is 17112221.

Together with previous prime (12221117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12221171 - 2⁶ = 12221107 is a prime.

It is a super-2 number, since 2×12221171² = 298714041222482, which contains 22 as substring.

Together with 12221173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12221173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110585 + 6110586.

It is an arithmetic number, because the mean of its divisors is an integer number (6110586).

Almost surely, 2^12221171 is an apocalyptic number.

12221171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221171 is an equidigital number, since it uses as much as digits as its factorization.

12221171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 17.

The square root of 12221171 is about 3495.8791455083. The cubic root of 12221171 is about 230.3408368197.

Adding to 12221171 its reverse (17112221), we get a palindrome (29333392).

The spelling of 12221171 in words is "twelve million, two hundred twenty-one thousand, one hundred seventy-one".