1123511143 has 2 divisors, whose sum is σ = 1123511144. Its totient is φ = 1123511142.

The previous prime is 1123511131. The next prime is 1123511149. The reversal of 1123511143 is 3411153211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123511143 - 2⁵ = 1123511111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123511149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561755571 + 561755572.

It is an arithmetic number, because the mean of its divisors is an integer number (561755572).

Almost surely, 2^1123511143 is an apocalyptic number.

1123511143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123511143 is an equidigital number, since it uses as much as digits as its factorization.

1123511143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1123511143 is about 33518.8177446640. The cubic root of 1123511143 is about 1039.5829019612.

Adding to 1123511143 its reverse (3411153211), we get a palindrome (4534664354).

The spelling of 1123511143 in words is "one billion, one hundred twenty-three million, five hundred eleven thousand, one hundred forty-three".