12202171 has 2 divisors, whose sum is σ = 12202172. Its totient is φ = 12202170.

The previous prime is 12202139. The next prime is 12202181. The reversal of 12202171 is 17120221.

It is a strong prime.

It is an emirp because it is prime and its reverse (17120221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12202171 - 2⁵ = 12202139 is a prime.

It is a super-2 number, since 2×12202171² = 297785954226482, which contains 22 as substring.

It is equal to p₈₀₀₄₁₃ and since 12202171 and 800413 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 (12202181) 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, 6101085 + 6101086.

It is an arithmetic number, because the mean of its divisors is an integer number (6101086).

Almost surely, 2^12202171 is an apocalyptic number.

12202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202171 is an equidigital number, since it uses as much as digits as its factorization.

12202171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12202171 is about 3493.1606032360. The cubic root of 12202171 is about 230.2214062058.

Adding to 12202171 its reverse (17120221), we get a palindrome (29322392).

The spelling of 12202171 in words is "twelve million, two hundred two thousand, one hundred seventy-one".