1123203123 has 24 divisors (see below), whose sum is σ = 1872545376. Its totient is φ = 635472000.

The previous prime is 1123203097. The next prime is 1123203127. The reversal of 1123203123 is 3213023211.

It is not a de Polignac number, because 1123203123 - 2¹⁴ = 1123186739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123203096 and 1123203105.

It is not an unprimeable number, because it can be changed into a prime (1123203127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81898 + ... + 94623.

It is an arithmetic number, because the mean of its divisors is an integer number (78022724).

Almost surely, 2^1123203123 is an apocalyptic number.

1123203123 is a deficient number, since it is larger than the sum of its proper divisors (749342253).

1123203123 is a wasteful number, since it uses less digits than its factorization.

1123203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176635 (or 176632 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1123203123 is about 33514.2226972371. Note that the first 3 decimals coincide. The cubic root of 1123203123 is about 1039.4878898216.

Adding to 1123203123 its reverse (3213023211), we get a palindrome (4336226334).

The spelling of 1123203123 in words is "one billion, one hundred twenty-three million, two hundred three thousand, one hundred twenty-three".