206057112171 has 16 divisors (see below), whose sum is σ = 289225230336. Its totient is φ = 130235912576.

The previous prime is 206057112133. The next prime is 206057112181. The reversal of 206057112171 is 171211750602.

It is a cyclic number.

It is not a de Polignac number, because 206057112171 - 2¹¹ = 206057110123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206057112181) 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 in 15 ways as a sum of consecutive naturals, for example, 13206075 + ... + 13221668.

It is an arithmetic number, because the mean of its divisors is an integer number (18076576896).

Almost surely, 2^206057112171 is an apocalyptic number.

206057112171 is a deficient number, since it is larger than the sum of its proper divisors (83168118165).

206057112171 is a wasteful number, since it uses less digits than its factorization.

206057112171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26427882.

The product of its (nonzero) digits is 5880, while the sum is 33.

Adding to 206057112171 its reverse (171211750602), we get a palindrome (377268862773).

The spelling of 206057112171 in words is "two hundred six billion, fifty-seven million, one hundred twelve thousand, one hundred seventy-one".