1121111113 has 4 divisors (see below), whose sum is σ = 1121178240. Its totient is φ = 1121043988.

The previous prime is 1121111111. The next prime is 1121111119. The reversal of 1121111113 is 3111111211.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121111113 - 2¹ = 1121111111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121111093 and 1121111102.

It is not an unprimeable number, because it can be changed into a prime (1121111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13308 + ... + 49186.

It is an arithmetic number, because the mean of its divisors is an integer number (280294560).

Almost surely, 2^1121111113 is an apocalyptic number.

It is an amenable number.

1121111113 is a deficient number, since it is larger than the sum of its proper divisors (67127).

1121111113 is an equidigital number, since it uses as much as digits as its factorization.

1121111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67126.

The product of its digits is 6, while the sum is 13.

The square root of 1121111113 is about 33482.9973718005. The cubic root of 1121111113 is about 1038.8421263738.

Adding to 1121111113 its reverse (3111111211), we get a palindrome (4232222324).

The spelling of 1121111113 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirteen".