122222171 has 2 divisors, whose sum is σ = 122222172. Its totient is φ = 122222170.

The previous prime is 122222159. The next prime is 122222173. The reversal of 122222171 is 171222221.

It is a strong prime.

It is an emirp because it is prime and its reverse (171222221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122222171 - 2¹⁰ = 122221147 is a prime.

Together with 122222173, 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 (122222173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61111085 + 61111086.

It is an arithmetic number, because the mean of its divisors is an integer number (61111086).

Almost surely, 2^122222171 is an apocalyptic number.

122222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

122222171 is an equidigital number, since it uses as much as digits as its factorization.

122222171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 122222171 is about 11055.4136512389. The cubic root of 122222171 is about 496.2684483241.

Adding to 122222171 its reverse (171222221), we get a palindrome (293444392).

Subtracting 122222171 from its reverse (171222221), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 122222171 in words is "one hundred twenty-two million, two hundred twenty-two thousand, one hundred seventy-one".