1111112120171 has 2 divisors, whose sum is σ = 1111112120172. Its totient is φ = 1111112120170.

The previous prime is 1111112120159. The next prime is 1111112120213. The reversal of 1111112120171 is 1710212111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111112120171 - 2¹⁰ = 1111112119147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1111112120971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555556060085 + 555556060086.

It is an arithmetic number, because the mean of its divisors is an integer number (555556060086).

Almost surely, 2^{1111112120171} is an apocalyptic number.

1111112120171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111112120171 is an equidigital number, since it uses as much as digits as its factorization.

1111112120171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 20.

Adding to 1111112120171 its reverse (1710212111111), we get a palindrome (2821324231282).

The spelling of 1111112120171 in words is "one trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty thousand, one hundred seventy-one".