1123411111 has 4 divisors (see below), whose sum is σ = 1150811424. Its totient is φ = 1096010800.

The previous prime is 1123411109. The next prime is 1123411129. The reversal of 1123411111 is 1111143211.

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 1123411111 - 2¹ = 1123411109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123411181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13700095 + ... + 13700176.

It is an arithmetic number, because the mean of its divisors is an integer number (287702856).

Almost surely, 2^1123411111 is an apocalyptic number.

1123411111 is a deficient number, since it is larger than the sum of its proper divisors (27400313).

1123411111 is an equidigital number, since it uses as much as digits as its factorization.

1123411111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27400312.

The product of its digits is 24, while the sum is 16.

The square root of 1123411111 is about 33517.3255347141. The cubic root of 1123411111 is about 1039.5520479004.

Adding to 1123411111 its reverse (1111143211), we get a palindrome (2234554322).

The spelling of 1123411111 in words is "one billion, one hundred twenty-three million, four hundred eleven thousand, one hundred eleven".