1116171216161 has 6 divisors (see below), whose sum is σ = 1133079138450. Its totient is φ = 1099511939856.

The previous prime is 1116171216157. The next prime is 1116171216179. The reversal of 1116171216161 is 1616121716111.

It can be written as a sum of positive squares in only one way, i.e., 956875240000 + 159295976161 = 978200^2 + 399119^2 .

It is not a de Polignac number, because 1116171216161 - 2² = 1116171216157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116171216191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124318436 + ... + 124327413.

It is an arithmetic number, because the mean of its divisors is an integer number (188846523075).

Almost surely, 2^{1116171216161} is an apocalyptic number.

It is an amenable number.

1116171216161 is a deficient number, since it is larger than the sum of its proper divisors (16907922289).

1116171216161 is an frugal number, since it uses more digits than its factorization.

1116171216161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248645983 (or 248645916 counting only the distinct ones).

The product of its digits is 3024, while the sum is 35.

The spelling of 1116171216161 in words is "one trillion, one hundred sixteen billion, one hundred seventy-one million, two hundred sixteen thousand, one hundred sixty-one".