1123124311 has 4 divisors (see below), whose sum is σ = 1123766752. Its totient is φ = 1122481872.

The previous prime is 1123124287. The next prime is 1123124341. The reversal of 1123124311 is 1134213211.

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 1123124311 - 2¹¹ = 1123122263 is a prime.

It is a super-2 number, since 2×1123124311² = 2522816435918449442, 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 (1123124341) 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, 318591 + ... + 322096.

It is an arithmetic number, because the mean of its divisors is an integer number (280941688).

Almost surely, 2^1123124311 is an apocalyptic number.

1123124311 is a deficient number, since it is larger than the sum of its proper divisors (642441).

1123124311 is an equidigital number, since it uses as much as digits as its factorization.

1123124311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642440.

The product of its digits is 144, while the sum is 19.

The square root of 1123124311 is about 33513.0468772984. The cubic root of 1123124311 is about 1039.4635766069.

Adding to 1123124311 its reverse (1134213211), we get a palindrome (2257337522).

Subtracting 1123124311 from its reverse (1134213211), we obtain a square (11088900 = 3330²).

The spelling of 1123124311 in words is "one billion, one hundred twenty-three million, one hundred twenty-four thousand, three hundred eleven".