1012198171 has 2 divisors, whose sum is σ = 1012198172. Its totient is φ = 1012198170.

The previous prime is 1012198163. The next prime is 1012198181. The reversal of 1012198171 is 1718912101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012198171 - 2³ = 1012198163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012198141) 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, 506099085 + 506099086.

It is an arithmetic number, because the mean of its divisors is an integer number (506099086).

Almost surely, 2^1012198171 is an apocalyptic number.

1012198171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012198171 is an equidigital number, since it uses as much as digits as its factorization.

1012198171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 31.

The square root of 1012198171 is about 31815.0620147125. The cubic root of 1012198171 is about 1004.0496353164.

The spelling of 1012198171 in words is "one billion, twelve million, one hundred ninety-eight thousand, one hundred seventy-one".