100011001

100011001 is a binary numeral consisting of nine bits. In decimal notation it equals 281; in hexadecimal it is 0x119, and in octal it is 431. As a binary string, it begins with 1 and ends with 1, making it an odd value. The bit pattern 100011001 is not a palindrome, since reversing the digits yields 100110001.

In computing and digital design, such a nine-bit sequence can represent a literal value or be used as a pattern for illustrating binary-to-decimal and binary-to-hex conversions. With standard 8-bit bytes, nine-bit values are less common but can appear in architectures or data encodings that use non-byte-aligned word lengths, or in educational materials to demonstrate base conversions.

As a standalone string, 100011001 does not correspond to a widely recognized code point in ASCII or Unicode. It may appear in examples, test data, or as part of a larger bitstream, where its meaning depends on the surrounding context. When interpreted as a decimal number, 281 is prime.