odd, prime, palindrome · 101st positive integer
The number 101
101 is an odd prime number. It is the 101st positive integer.
Quick reference
| Prime factorization | 101 (prime) |
| Divisors | 1, 101 |
| Binary | 1100101 |
| Hexadecimal | 0x65 |
| Roman numeral | CI |
| Digit sum | 2 |
| Properties | odd, prime, palindrome |
Reading 101 in NumGrid context
The 101 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 101 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 101’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 101 a prime number?
Yes. 101 is prime — its only divisors are 1 and itself.
What are the factors of 101?
The factors (divisors) of 101 are 1, 101.
What is 101 in binary?
101 in binary is 1100101. In hexadecimal it's 65.
What is 101 as a Roman numeral?
101 in Roman numerals is CI.
What's the digit sum of 101?
Adding the digits of 101: 1 + 0 + 1 = 2.