171111000001111 has 4 divisors (see below), whose sum is σ = 171272273329224. Its totient is φ = 170949726673000.

The previous prime is 171111000001079. The next prime is 171111000001127. The reversal of 171111000001111 is 111100000111171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171111000001111 - 2⁵ = 171111000001079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171111000001141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80636662465 + ... + 80636664586.

It is an arithmetic number, because the mean of its divisors is an integer number (42818068332306).

Almost surely, 2^{171111000001111} is an apocalyptic number.

171111000001111 is a deficient number, since it is larger than the sum of its proper divisors (161273328113).

171111000001111 is a wasteful number, since it uses less digits than its factorization.

171111000001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161273328112.

The product of its (nonzero) digits is 7, while the sum is 16.

Adding to 171111000001111 its reverse (111100000111171), we get a palindrome (282211000112282).

The spelling of 171111000001111 in words is "one hundred seventy-one trillion, one hundred eleven billion, one thousand, one hundred eleven".