Is it true planet x makes a orbit by earth every 3,500 years?

Planet X has a real name. It is called Nibiru. It does orbit every 3,600 years, but when it goes around in it orbits, it will be between Mars and Jupiter. It will not be very close to us at all. If something was coming at us, like a planet or an asteroid or a meteor, NASA and all the really big space agencies including Russia would be working together to destroy it. We don't need to worry.