1222222171 has 2 divisors, whose sum is σ = 1222222172. Its totient is φ = 1222222170.

The previous prime is 1222222121. The next prime is 1222222181. The reversal of 1222222171 is 1712222221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222222171 - 2¹⁵ = 1222189403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611111085 + 611111086.

It is an arithmetic number, because the mean of its divisors is an integer number (611111086).

Almost surely, 2^1222222171 is an apocalyptic number.

1222222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222222171 is an equidigital number, since it uses as much as digits as its factorization.

1222222171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 22.

The square root of 1222222171 is about 34960.2942064280. The cubic root of 1222222171 is about 1069.1780950625.

Adding to 1222222171 its reverse (1712222221), we get a palindrome (2934444392).

The spelling of 1222222171 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred seventy-one".