11123143243 has 4 divisors (see below), whose sum is σ = 11125648960. Its totient is φ = 11120637528.

The previous prime is 11123143223. The next prime is 11123143261. The reversal of 11123143243 is 34234132111.

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 11123143243 - 2⁵ = 11123143211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123143223) 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, 1246188 + ... + 1255081.

It is an arithmetic number, because the mean of its divisors is an integer number (2781412240).

Almost surely, 2^11123143243 is an apocalyptic number.

11123143243 is a deficient number, since it is larger than the sum of its proper divisors (2505717).

11123143243 is an equidigital number, since it uses as much as digits as its factorization.

11123143243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505716.

The product of its digits is 1728, while the sum is 25.

Adding to 11123143243 its reverse (34234132111), we get a palindrome (45357275354).

The spelling of 11123143243 in words is "eleven billion, one hundred twenty-three million, one hundred forty-three thousand, two hundred forty-three".