2,021 in Roman numerals
MMXXI
The number 2,021 is written MMXXI in Roman numerals. As a year it appears in copyright lines and cornerstones written this way.
How MMXXI breaks down
| Symbols | Value |
|---|---|
MM | 2 × 1,000 = 2,000 |
XX | 2 × 10 = 20 |
I | 1 |
MMXXI | 2,021 |
Every symbol here is written in descending order and simply added together — no subtractive pairs are involved.
Nearby numbers
| Number | Roman numeral |
|---|---|
| 2,016 | MMXVI |
| 2,017 | MMXVII |
| 2,018 | MMXVIII |
| 2,019 | MMXIX |
| 2,020 | MMXX |
| 2,021 | MMXXI |
| 2,022 | MMXXII |
| 2,023 | MMXXIII |
| 2,024 | MMXXIV |
| 2,025 | MMXXV |
| 2,026 | MMXXVI |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
2,021 in other notations
| Roman | MMXXI |
| Binary | 11111100101 |
| Hexadecimal | 7E5 |
| Octal | 3745 |
| Written out | two thousand and twenty-one |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 2,021:
2 × M = 2000 remaining: 21
2 × X = 20 remaining: 1
I = 1 remaining: 0The result reads MMXXI — 5 characters, against 4 digits in Arabic numerals.
Frequently asked questions
What is 2,021 in Roman numerals?
MMXXI
How do you read MMXXI?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. MM is 2,000, XX is 20, I is 1, giving 2,021 in total.
How do you write 2,021 in words?
two thousand and twenty-one.
Why is there no zero?
Roman numerals have no symbol for zero. The concept reached Europe only with Hindu-Arabic numerals, centuries after the system was in use — which is a large part of why it was eventually replaced for arithmetic.