1118811161161 has 4 divisors (see below), whose sum is σ = 1124433328000. Its totient is φ = 1113188994324.

The previous prime is 1118811161087. The next prime is 1118811161179. The reversal of 1118811161161 is 1611611188111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1118811161161 - 2²³ = 1118802772553 is a prime.

It is a super-2 number, since 2×1118811161161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1118811161161.

It is not an unprimeable number, because it can be changed into a prime (1118811165161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2811083121 + ... + 2811083518.

It is an arithmetic number, because the mean of its divisors is an integer number (281108332000).

Almost surely, 2^{1118811161161} is an apocalyptic number.

It is an amenable number.

1118811161161 is a deficient number, since it is larger than the sum of its proper divisors (5622166839).

1118811161161 is an equidigital number, since it uses as much as digits as its factorization.

1118811161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622166838.

The product of its digits is 2304, while the sum is 37.

The spelling of 1118811161161 in words is "one trillion, one hundred eighteen billion, eight hundred eleven million, one hundred sixty-one thousand, one hundred sixty-one".