| Name | EMPTY SET |
| Unicode Version | 1.1 |
| Block（ブロック） | Mathematical Operators（数学記号） |
| Plane（面） | Basic Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | ∅ ∅ |
| UTF-8 Encoding | ∅ e28885 |
| UTF-16 Encoding | ∅ 2205 |
| UTF-32 Encoding | ∅ 00002205 |