1012201112171 has 2 divisors, whose sum is σ = 1012201112172. Its totient is φ = 1012201112170.

The previous prime is 1012201112077. The next prime is 1012201112173. The reversal of 1012201112171 is 1712111022101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012201112171 - 2¹⁸ = 1012200850027 is a prime.

Together with 1012201112173, 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 (1012201112173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506100556085 + 506100556086.

It is an arithmetic number, because the mean of its divisors is an integer number (506100556086).

Almost surely, 2^{1012201112171} is an apocalyptic number.

1012201112171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012201112171 is an equidigital number, since it uses as much as digits as its factorization.

1012201112171 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 20.

Adding to 1012201112171 its reverse (1712111022101), we get a palindrome (2724312134272).

The spelling of 1012201112171 in words is "one trillion, twelve billion, two hundred one million, one hundred twelve thousand, one hundred seventy-one".