In today's terms it is MMDCCCXCI but the Romans themselves would have probably written it out as MMDCCCLXXXXI.
2891 = אלפיים ×©×ž×•× ×” מאות תשעים ואחת
Roman numerals are a system for writing numbers, not words. the Roman numeral for 4 is IV.
1008 in Roman numberals is MVIII
XCVIII is 98 in Roman numerals
Roman numerals for 201 = CCI
MCMLXXXVII
XLII
MCMLXXXIX
XIIth
MMX
DXXVII is the answer.
LXXV