1000222112171 has 2 divisors, whose sum is σ = 1000222112172. Its totient is φ = 1000222112170.

The previous prime is 1000222112041. The next prime is 1000222112173. The reversal of 1000222112171 is 1712112220001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1712112220001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000222112171 is a prime.

Together with 1000222112173, 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 (1000222112173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500111056085 + 500111056086.

It is an arithmetic number, because the mean of its divisors is an integer number (500111056086).

Almost surely, 2^{1000222112171} is an apocalyptic number.

1000222112171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000222112171 is an equidigital number, since it uses as much as digits as its factorization.

1000222112171 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1000222112171 its reverse (1712112220001), we get a palindrome (2712334332172).

The spelling of 1000222112171 in words is "one trillion, two hundred twenty-two million, one hundred twelve thousand, one hundred seventy-one".