12101222171 has 2 divisors, whose sum is σ = 12101222172. Its totient is φ = 12101222170.

The previous prime is 12101222143. The next prime is 12101222173. The reversal of 12101222171 is 17122210121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12101222171 - 2²⁶ = 12034113307 is a prime.

Together with 12101222173, 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 (12101222173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050611085 + 6050611086.

It is an arithmetic number, because the mean of its divisors is an integer number (6050611086).

Almost surely, 2^12101222171 is an apocalyptic number.

12101222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101222171 is an equidigital number, since it uses as much as digits as its factorization.

12101222171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 12101222171 its reverse (17122210121), we get a palindrome (29223432292).

The spelling of 12101222171 in words is "twelve billion, one hundred one million, two hundred twenty-two thousand, one hundred seventy-one".