Numerosidad Number Atlas
The number 11, visualized
Eleven is the smallest two-digit palindrome and a prime number built from one ten and one one.
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Fixed-value symbol model for 11
one unit in the tens place + one unit in the ones place
One triangle-shaped fixed-value symbol worth 10 and one circle-shaped fixed-value symbol worth 1 combine to make 11.
This additive decimal model decomposes the number into repeated fixed-value symbols. Each symbol keeps its value wherever it appears, and repetitions add, so the complete pattern composes 11.
- one unit in the tens place
- 10
- one unit in the ones place
- 1
Number profile
Facts about 11
- Standard form
- 11
- Number name (word form)
- eleven
- Expanded form
- 10 + 1
- Classification
- Odd and prime
- Prime factorization
- 11
- Positive divisors (2)
- 1, 11
- Digits
- 2
- Digit sum
- 2
- Digital root
- 2
- Fixed-value symbols
- 2
Created and reviewed by Entropycal Studio LLC · Reviewed · How this page was created and checked
Why it stands out
Patterns inside 11
The number 11 pairs a symmetric decimal pattern with prime structure and a particularly direct two-place visualization.
It is the smallest two-digit palindrome
Reversing the two identical digits leaves 11 unchanged, and no smaller two-digit number has that property.
Its repeated digits do not make it composite
Despite being written with two identical digits, 11 has no positive divisors beyond 1 and 11, so it is prime.
Standard notation repeats the same digit
The expanded form 10 + 1 gives a digit of 1 in both the tens and ones positions of standard notation.