0x2124

0x2124 is the hexadecimal encoding that corresponds to the Unicode code point U+2124. The character at this code point is ℤ, the double-struck capital Z, commonly used in mathematics to denote the set of all integers. In decimal terms, 0x2124 equals 8484.

Unicode placement and naming: ℤ is part of the Unicode Letterlike Symbols block (ranging from U+2100 to U+214F). It is treated as a letter and is typically rendered in a blackboard bold style in mathematical fonts. In many typesetting systems, the mathematical variant is produced with a symbol command such as LaTeX's \\mathbb{Z} or by selecting a Unicode font that includes the glyph.

Usage in mathematics: The symbol is widely used to denote the ring or additive group of integers, written as Z = {..., -2, -1, 0, 1, 2, ...}. It appears across algebra, number theory, cryptography, and related fields. The symbol is often contrasted with other standard number sets, such as natural numbers ℕ, rational numbers ℚ, real numbers ℝ, and complex numbers ℂ.

Notes: Rendering can vary by font; some environments may substitute a plain Z if the glyph is unavailable. As with other Unicode symbols, proper font support is required for correct display. Aside from representing the character ℤ, the sequence 0x2124 has no widely used meaning as an address or protocol identifier.