C# :

using System;
using System.Numerics;

class Program
{
    static void Main()
    {
        // 超大數字
        string bigNumberStr = "230652215040745127565278404175305086968";

        // 轉換為 BigInteger
        BigInteger bigNumber = BigInteger.Parse(bigNumberStr);

        // 轉換為二進位字串
        string binaryString = ConvertToBinary(bigNumber);

        // 輸出結果
        Console.WriteLine($"Decimal: {bigNumberStr}");
        Console.WriteLine($"Binary: {binaryString}");
    }

    static string ConvertToBinary(BigInteger number)
    {
        return number.ToString("X");  // 轉換為十六進位字串，要轉其他像是 2 進位的也可以但就很長
    }
}

SQL不確定，但應該大概如下:

DECLARE @bigNumber DECIMAL(38, 0) = 230652215040745127565278404175305086968;
DECLARE @binaryData VARBINARY(MAX);

-- 轉換為 VARBINARY
SET @binaryData = CONVERT(VARBINARY(MAX), @bigNumber);

-- 轉換為 2 進位字串
SELECT CONCAT('0x', CAST(@binaryData AS VARCHAR(MAX))) AS BinaryString;