1121111105 has 4 divisors (see below), whose sum is σ = 1345333332. Its totient is φ = 896888880.

The previous prime is 1121111083. The next prime is 1121111111. The reversal of 1121111105 is 5011111211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148669249 + 972441856 = 12193^2 + 31184^2 .

It is not a de Polignac number, because 1121111105 - 2²⁰ = 1120062529 is a prime.

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 1121111105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112111106 + ... + 112111115.

It is an arithmetic number, because the mean of its divisors is an integer number (336333333).

Almost surely, 2^1121111105 is an apocalyptic number.

It is an amenable number.

1121111105 is a deficient number, since it is larger than the sum of its proper divisors (224222227).

1121111105 is an equidigital number, since it uses as much as digits as its factorization.

1121111105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224222226.

The product of its (nonzero) digits is 10, while the sum is 14.

The square root of 1121111105 is about 33482.9972523369. The cubic root of 1121111105 is about 1038.8421239028.

Adding to 1121111105 its reverse (5011111211), we get a palindrome (6132222316).

The spelling of 1121111105 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred five".