12122222171 has 2 divisors, whose sum is σ = 12122222172. Its totient is φ = 12122222170.

The previous prime is 12122222153. The next prime is 12122222201. The reversal of 12122222171 is 17122222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12122222171 - 2¹⁰ = 12122221147 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122222971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061111085 + 6061111086.

It is an arithmetic number, because the mean of its divisors is an integer number (6061111086).

Almost surely, 2^12122222171 is an apocalyptic number.

12122222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122222171 is an equidigital number, since it uses as much as digits as its factorization.

12122222171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

Adding to 12122222171 its reverse (17122222121), we get a palindrome (29244444292).

The spelling of 12122222171 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred seventy-one".