| Name | CIRCLED DIGIT ONE |
| Unicode Version | 1.1 |
| Block（ブロック） | Enclosed Alphanumerics（囲み英数字） |
| Plane（面） | Basic Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | ① ① |
| UTF-8 Encoding | ① e291a0 |
| UTF-16 Encoding | ① 2460 |
| UTF-32 Encoding | ① 00002460 |