1123120423 has 2 divisors, whose sum is σ = 1123120424. Its totient is φ = 1123120422.

The previous prime is 1123120391. The next prime is 1123120433. The reversal of 1123120423 is 3240213211.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3240213211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123120423 - 2⁵ = 1123120391 is a prime.

It is a super-2 number, since 2×1123120423² = 2522798969119397858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123120423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123120433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561560211 + 561560212.

It is an arithmetic number, because the mean of its divisors is an integer number (561560212).

Almost surely, 2^1123120423 is an apocalyptic number.

1123120423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123120423 is an equidigital number, since it uses as much as digits as its factorization.

1123120423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1123120423 is about 33512.9888699889. The cubic root of 1123120423 is about 1039.4623771437.

Adding to 1123120423 its reverse (3240213211), we get a palindrome (4363333634).

The spelling of 1123120423 in words is "one billion, one hundred twenty-three million, one hundred twenty thousand, four hundred twenty-three".