Properties of the Number -111111

One Hundred Eleven Thousand One Hundred Eleven

Basics

Value: -111112 → -111111 → -111110

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 6

Digital Root: 6

Palindrome: Yes

Factorization: 3 × 7 × 11 × 13 × 37

Divisors: 1, 3, 7, 11, 13, 21, 33, 37, 39, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11011001000000111

Octal: -331007

Duodecimal: -54373

Hexadecimal: -1b207

Square: 12345654321

Square Root: 333.333166666625

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

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

Unary representation of natural numbers. A42

Numbers whose square is a palindrome. A2778

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

Least positive multiple of n that when written in base 10 uses only 0's and 1's. A4290

Palindromes only using 0 and 1 (i.e., base-2 palindromes). A57148

Triangle of Gaussian binomial coefficients [ n,k ] for q = 10. A22174

The sequence S = a(1), a(2), ... is defined by a(1)=1, if d,e,f are consecutive digits then we do not have d >= e < f, and S is always extended with the smallest integer not yet present in S. A239090