1001222171 has 2 divisors, whose sum is σ = 1001222172. Its totient is φ = 1001222170.

The previous prime is 1001222161. The next prime is 1001222179. The reversal of 1001222171 is 1712221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001222171 - 2⁶ = 1001222107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001222179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500611085 + 500611086.

It is an arithmetic number, because the mean of its divisors is an integer number (500611086).

Almost surely, 2^1001222171 is an apocalyptic number.

1001222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222171 is an equidigital number, since it uses as much as digits as its factorization.

1001222171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1001222171 is about 31642.0949211647. The cubic root of 1001222171 is about 1000.4072244790.

Adding to 1001222171 its reverse (1712221001), we get a palindrome (2713443172).

The spelling of 1001222171 in words is "one billion, one million, two hundred twenty-two thousand, one hundred seventy-one".