BRUSSELS, Belgium (AP) _ President Reagan will attend a special NATO meeting in Brussels on Nov. 21 to discuss the results of his summit meeting with Soviet leader Mikhail S. Gorbachev, NATO announced Friday.

A one-sentence statement from the office of NATO Secretary-General Lord Carrington said Reagan would attend a special session of the North Atlantic Council, the alliance's highest political body.

The meeting would allow the allies to ''hear first hand of the results'' of the summit meeting in Geneva on Nov. 19 and 20 and to consult on the ''wider and longer-term process of strengthening security and improving East-West relations,'' the NATO statement said.

The North Atlantic Council meets every week at the level of ambassadors to the North Atlantic Treaty Organization, and twice a year the council meets at the level of foreign ministers.

The NATO statement did not say whether any national leaders of the 15 other NATO nations would attend the Nov. 21 meeting.