101111101

101111101 is a nine-bit binary numeral consisting of the digits 1, 0, 1, 1, 1, 1, 1, 0, 1. In binary, this pattern represents the decimal value 381. It can also be expressed in other bases: hexadecimal 0x17D and octal 0o575. The string is a palindrome, meaning it reads the same forwards and backwards, which places it among palindromic binary numbers of length nine.

As an unsigned value, 101111101 lies in the 256 to 511 range. If interpreted as a 9-bit two's complement signed integer, the leading bit denotes a negative value, and the binary 101111101 corresponds to 381 minus 512, i.e., -131.

The pattern is notable for its symmetry and can serve as a useful example in discussions of binary representations, palindromic sequences, and finite-bit arithmetic. Palindromic bitstrings are often used as test vectors in digital design to verify symmetry properties, data routing, and error-detection schemes.

In summary, 101111101 is a palindromic nine-bit binary number with a decimal value of 381 (unsigned), 0x17D in hexadecimal, and -131 when interpreted as a 9-bit two's complement signed value. It exemplifies how a simple binary string can have multiple interpretations and uses in computing.