The number 0.133134135... is a non-repeating decimal. It continues with an increasing sequence of digits after the decimal point (1, 3, 3, 1, 3, 4, 1, 3, 5, ...), showing that it does not have a repeating pattern. This type of number is often classified as an irrational number if it cannot be expressed as a fraction of two integers. However, it might not be directly characterized as such without additional information about the sequence's rule.
If you have more specific descriptions or options to match with, please provide them, and I can assist further!