2,001 in Roman numerals
MMI
The number 2,001 is written MMI in Roman numerals. As a year it appears in copyright lines and cornerstones written this way.
How MMI breaks down
| Symbols | Value |
|---|---|
MM | 2 × 1,000 = 2,000 |
I | 1 |
MMI | 2,001 |
Every symbol here is written in descending order and simply added together — no subtractive pairs are involved.
Nearby numbers
| Number | Roman numeral |
|---|---|
| 1,996 | MCMXCVI |
| 1,997 | MCMXCVII |
| 1,998 | MCMXCVIII |
| 1,999 | MCMXCIX |
| 2,000 | MM |
| 2,001 | MMI |
| 2,002 | MMII |
| 2,003 | MMIII |
| 2,004 | MMIV |
| 2,005 | MMV |
| 2,006 | MMVI |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
2,001 in other notations
| Roman | MMI |
| Binary | 11111010001 |
| Hexadecimal | 7D1 |
| Octal | 3721 |
| Written out | two thousand and 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 2,001:
2 × M = 2000 remaining: 1
I = 1 remaining: 0The result reads MMI — 3 characters, against 4 digits in Arabic numerals.
Frequently asked questions
What is 2,001 in Roman numerals?
MMI
How do you read MMI?
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, I is 1, giving 2,001 in total.
How do you write 2,001 in words?
two thousand and 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.