1123311143 has 4 divisors (see below), whose sum is σ = 1162046040. Its totient is φ = 1084576248.

The previous prime is 1123311131. The next prime is 1123311151. The reversal of 1123311143 is 3411133211.

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 1123311143 - 2¹⁰ = 1123310119 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 (1123313143) 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, 19367405 + ... + 19367462.

It is an arithmetic number, because the mean of its divisors is an integer number (290511510).

Almost surely, 2^1123311143 is an apocalyptic number.

1123311143 is a deficient number, since it is larger than the sum of its proper divisors (38734897).

1123311143 is an equidigital number, since it uses as much as digits as its factorization.

1123311143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38734896.

The product of its digits is 216, while the sum is 20.

The square root of 1123311143 is about 33515.8342130999. The cubic root of 1123311143 is about 1039.5212117501.

Adding to 1123311143 its reverse (3411133211), we get a palindrome (4534444354).

The spelling of 1123311143 in words is "one billion, one hundred twenty-three million, three hundred eleven thousand, one hundred forty-three".