using System;

public class Program

{

    public static void Main()

    {

        var result = int.Parse("4128773");

        var binaryString = Convert.ToString(result, 2); //22 bits, so 24 bits minus the parity bit for each byteset

        Console.WriteLine(binaryString);

​

        var facilityCodeBinary = binaryString.Substring(0, 11);

        Console.WriteLine($"{nameof(facilityCodeBinary)}: {facilityCodeBinary}");

​

        var cardNumberBinary = binaryString.Substring(11, 11);

        Console.WriteLine($"{nameof(cardNumberBinary)}: {cardNumberBinary}");

​

        var facilityCode = Convert.ToInt32(facilityCodeBinary, 2);

        Console.WriteLine($"{nameof(facilityCode)}: {facilityCode}");

​

        var cardNumber = Convert.ToInt32(cardNumberBinary, 2);

        Console.WriteLine($"{nameof(cardNumber)}: {cardNumber}");

    }

}