101010101101

101010101101 is a 12-bit binary string that is sometimes used as an illustrative example in discussions of binary representations. As a binary number, it equals 2733 in decimal and 0xAAD in hexadecimal.

Pattern and structure: The sequence begins with eight bits in an alternating pattern (10101010), followed by the bits 1101. The string contains seven 1s, giving it an odd Hamming weight. In a two's complement interpretation as a 12-bit signed integer, it represents -1363.

Uses and context: It serves as a simple fixed test vector in digital logic, data encoding demonstrations, and introductory explanations of binary-to-hex conversions. It is not tied to a widely recognized standard or a commonly used constant.

Notes and properties: The pattern is not a palindrome; its reversal is 101101010101. As a fixed binary example, it illustrates how bit patterns can vary within a fixed length and how such patterns translate across numeral systems and signed interpretations.