12221032171 has 2 divisors, whose sum is σ = 12221032172. Its totient is φ = 12221032170.

The previous prime is 12221032169. The next prime is 12221032181. The reversal of 12221032171 is 17123012221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12221032171 - 2¹ = 12221032169 is a prime.

Together with 12221032169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12221032181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110516085 + 6110516086.

It is an arithmetic number, because the mean of its divisors is an integer number (6110516086).

Almost surely, 2^12221032171 is an apocalyptic number.

12221032171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221032171 is an equidigital number, since it uses as much as digits as its factorization.

12221032171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 12221032171 its reverse (17123012221), we get a palindrome (29344044392).

The spelling of 12221032171 in words is "twelve billion, two hundred twenty-one million, thirty-two thousand, one hundred seventy-one".