1118888111 has 4 divisors (see below), whose sum is σ = 1220605224. Its totient is φ = 1017171000.

The previous prime is 1118888087. The next prime is 1118888171.

It is a happy number.

1118888111 is nontrivially palindromic in base 10.

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 1118888111 - 2¹⁰ = 1118887087 is a prime.

1118888111 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118888171) 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, 50858540 + ... + 50858561.

It is an arithmetic number, because the mean of its divisors is an integer number (305151306).

Almost surely, 2^1118888111 is an apocalyptic number.

1118888111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1118888111 is a deficient number, since it is larger than the sum of its proper divisors (101717113).

1118888111 is a wasteful number, since it uses less digits than its factorization.

1118888111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101717112.

The product of its digits is 4096, while the sum is 38.

The square root of 1118888111 is about 33449.7849170963. The cubic root of 1118888111 is about 1038.1550472343.

It can be divided in two parts, 11188 and 88111, that added together give a palindrome (99299).

The spelling of 1118888111 in words is "one billion, one hundred eighteen million, eight hundred eighty-eight thousand, one hundred eleven".