Jews were not exiled from or to any country specifically in 1421 C.E. If the question actually refers to 1421 B.C.E., this is considered one of the earlier possible dates of the Exodus from Egypt described in the Old Testament (for those who believe that the Exodus is a historical fact).
Jews were not exiled to Shushan.
The Torah.
The Torah and Talmud.
1421 AD Beijing was made into Song Dynasty's capital.
As Jews were exiled and moved there.
They destroyed The Temple of Solomon and exiled the Jews.
1 January AD 2000 = 24 Ramadan 1420 AH 31 December AD 2000 = 4 Shawwal 1421 AH
Babylon, the Near East and North Africa.
They exiled (kicked out) the Jews and Muslims
As Jews moved and were exiled to new places.
The factors of 1421 are 1, 7, 29, 49, 203, and 1421. The prime factors of 1421 are 7 and 29.
That depends when. Before they were exiled all over the world, the Jews were in Israel.