Properties of the Number -11111

Eleven Thousand One Hundred Eleven

Basics

Value: -11112 → -11111 → -11110

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 5

Digital Root: 5

Palindrome: Yes

Factorization: 41 × 271

Divisors: 1, 41, 271, 11111

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10101101100111

Octal: -25547

Duodecimal: -651B

Hexadecimal: -2b67

Square: 123454321

Square Root: 105.40872829135166

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Inverse of number triangle A(n,k) = 1/((10·10ⁿ-1)/9) if k <= n <= 2k, 0 otherwise. A127805

Repunits: (10ⁿ - 1)/9. Often denoted by R_n. A2275

The binary numbers (or binary words, or binary vectors, or binary expansion of n): numbers written in base 2. A7088

Repdigit numbers, or numbers whose digits are all equal. A10785

Unary representation of natural numbers. A42

Primes written in base 2. A4676

Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order. A7931

Numbers whose square is a palindrome. A2778

a(n) is the negabinary expansion of n, that is, the expansion of n in base -2. A39724

Dual Zeckendorf representation of n or the maximal (binary) Fibonacci representation. Also list of binary vectors not containing 00. A104326