I want to know if my iPhone is original or not

I cannot imagine what additional information you want.

What does “original” mean to you exactly?

Your iPhone is an authentic Apple product. If you’re asking if it is refurbished, or a replacement, that cannot be determined this way, but it shouldn’t matter.

Since you saw the number, your iPhone is a legitimate Apple product.

Check here.

Check Your Service and Support Coverage - Apple Support

Glad that answered your question.

Enjoy your iPhone.