U+2124 DoubleStruck Capital Z
U+2124 was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Uppercase Letter and is commonly used, that is, in no specific script. The character is also known as the set of integers.
The glyph is a font version of the glyph
The Wikipedia has the following information about this codepoint:
An integer is the number zero (0), a positive natural number (1, 2, 3, etc.) or a negative integer (−1, −2, −3, etc.). The negative numbers are the additive inverses of the corresponding positive numbers. The set of all integers is often denoted by the boldface Z or blackboard bold $Z$.
The set of natural numbers $N$ is a subset of $Z$, which in turn is a subset of the set of all rational numbers $Q$, itself a subset of the real numbers $R$. Like the set of natural numbers, the set of integers $Z$ is countably infinite. An integer may be regarded as a real number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, 5+1/2, and √2 are not.
The integers form the smallest group and the smallest ring containing the natural numbers. In algebraic number theory, the integers are sometimes qualified as rational integers to distinguish them from the more general algebraic integers. In fact, (rational) integers are algebraic integers that are also rational numbers.
Representations
System  Representation 

Nº  8484 
UTF8  E2 84 A4 
UTF16  21 24 
UTF32  00 00 21 24 
URLQuoted  %E2%84%A4 
HTML hex reference  ℤ 
Wrong windows1252 Mojibake  â„¤ 
HTML named entity  ℤ 
HTML named entity  ℤ 
alias  the set of integers 
L^{A}T_{E}X  \mathbb{Z} 
Related Characters
Confusables
Elsewhere
Complete Record
Property  Value 

1.1 (1993)  
DOUBLESTRUCK CAPITAL Z  
DOUBLESTRUCK Z  
Letterlike Symbols  
Uppercase Letter  
Common  
Left To Right  
Not Reordered  
font  


✘  




✔  










✘  
✔  
✘  
✘  
✘  
✘  
✘  
✘  
✔  
✘  
✘  
✘  
✔  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  


Any  
✔  
✘  
✘  
✘  
✘  
✔  
✔  
✘  
✘  
0  
0  
0  
✘  
None  
—  
NA  
Other  
—  
✘  
✘  
✔  
✘  
Yes  
Yes  


No  


No  
✘  
✘  
✘  
✘  
✘  
✘  
✔  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
Upper  
✘  
✘  
✘  
✘  
✘  
Alphabetic Letter  
✘  
✔  
✔  
✘  
✘  
✘  
✘  


None  
neutral  
Not Applicable  
—  
No_Joining_Group  
Non Joining  
Alphabetic  
none  
not a number  


R 