1123143111 has 8 divisors (see below), whose sum is σ = 1663915760. Its totient is φ = 748762056.

The previous prime is 1123143089. The next prime is 1123143121. The reversal of 1123143111 is 1113413211.

It is a happy number.

1123143111 is a `hidden beast` number, since 1 + 1 + 231 + 431 + 1 + 1 = 666.

It is not a de Polignac number, because 1123143111 - 2⁹ = 1123142599 is a prime.

It is a super-2 number, since 2×1123143111² = 2522900895573516642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123143121) 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 7 ways as a sum of consecutive naturals, for example, 20798920 + ... + 20798973.

It is an arithmetic number, because the mean of its divisors is an integer number (207989470).

Almost surely, 2^1123143111 is an apocalyptic number.

1123143111 is a deficient number, since it is larger than the sum of its proper divisors (540772649).

1123143111 is an equidigital number, since it uses as much as digits as its factorization.

1123143111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41597902 (or 41597896 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1123143111 is about 33513.3273639011. The cubic root of 1123143111 is about 1039.4693764417.

Adding to 1123143111 its reverse (1113413211), we get a palindrome (2236556322).

The spelling of 1123143111 in words is "one billion, one hundred twenty-three million, one hundred forty-three thousand, one hundred eleven".