811111101111118 has 4 divisors (see below), whose sum is σ = 1216666651666680. Its totient is φ = 405555550555558.

The previous prime is 811111101111029. The next prime is 811111101111119.

811111101111118 is nontrivially palindromic in base 10.

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

811111101111118 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811111101111119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202777775277778 + ... + 202777775277781.

It is an arithmetic number, because the mean of its divisors is an integer number (304166662916670).

Almost surely, 2^{811111101111118} is an apocalyptic number.

811111101111118 is a deficient number, since it is larger than the sum of its proper divisors (405555550555562).

811111101111118 is a wasteful number, since it uses less digits than its factorization.

811111101111118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405555550555561.

The product of its (nonzero) digits is 64, while the sum is 28.

It can be divided in two parts, 81111110 and 1111118, that added together give a palindrome (82222228).

The spelling of 811111101111118 in words is "eight hundred eleven trillion, one hundred eleven billion, one hundred one million, one hundred eleven thousand, one hundred eighteen".