Properties of the Number -1111111111

One Hundred Eleven Million One Hundred Eleven Thousand One Hundred Eleven

Basics

Value: -1111111112 → -1111111111 → -1111111110

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: Yes

Factorization: 11 × 41 × 271 × 9091

Divisors: 1, 11, 41, 271, 451, 2981, 9091, 11111, 100001, 122221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -1000010001110100011010111000111

Octal: -10216432707

Duodecimal: -270138147

Hexadecimal: -423a35c7

Square: 1234567900987654321

Square Root: 33333.33333166667

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

a(n) = 0ⁿ + ((n-9)/9)*(1-10ⁿ). A91686

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

Unary representation of natural numbers. A42

a(n) = n⁰ + n¹ + ... + n^n-1, or a(n) = (nⁿ-1)/(n-1) with a(0)=0; a(1)=1. A23037

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

Numbers n with property that for each single digit d of n, we can also see the decimal expansions of d² and d³ as substrings of n. Also n may not contain any 0 digits. A135463

A(n,k) is n represented in bijective base-k numeration; square array A(n,k), n>=1, k>=1, read by antidiagonals. A214676

A shell geometric model of the nucleus. The location of the magic numbers. A triangle. A130598

Sums of 10 distinct powers of 10. A38452

A shell geometric model of the atomic nucleus. A130602