Properties of the Number -222111

Two Hundred Twenty-Two Thousand One Hundred Eleven

Basics

Value: -222112 → -222111 → -222110

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 23 × 29 × 37

Divisors: 1, 3, 9, 23, 29, 37, 69, 87, 111, 207

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110001110011111

Octal: -661637

Duodecimal: -A8653

Hexadecimal: -3639f

Square: 49333296321

Square Root: 471.2865370451399

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

Sequence is {a(6,n)}, where a(m,n) is defined at sequence A110665. A110671

Triangular numbers composed of digits {0,1,2}. A119033

Doubly triangular numbers: a(n) = n*(n+1)*(n²+n+2)/8. A2817

a(n) = arrange digits of concatenation of divisors of n (A037278, A176558) in decreasing order (in base 10). A243360

List of co-Lyndon words on {1,2} sorted first by length and then lexicographically. A329318

Triangular numbers that contain exactly 2 different digits. A62691

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>1. A259746

Iterated triangular numbers with seed 8. A50536

List of words over {1,2} with equal numbers of 1's and 2's. A214218

Triangular numbers having only 1 or 2 different digits in base 10. A213516