Properties of the Number -122121

One Hundred Twenty-Two Thousand One Hundred Twenty-One

Basics

Value: -122122 → -122121 → -122120

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 4523

Divisors: 1, 3, 9, 27, 4523, 13569, 40707, 122121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101110100001001

Octal: -356411

Duodecimal: -5A809

Hexadecimal: -1dd09

Square: 14913538641

Square Root: 349.4581520010658

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

Consider the Post tag system described in A284116 (but adapted to the alphabet {1,2}) ; sequence lists the words that terminate in the empty word. A289675

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

Unique representation of nonnegative numbers by iterated tribonacci A, B and C sequences. A316713

Triangle read by rows in which row n lists the binary words of length n over the alphabet {1,2} with no initial repeats. A211029

Fibonacci sequence in base 2 of the alternate number system. A85652

List of subwords (or factors) of the Thue-Morse "1,2"-word A001285. A214215

Expansion of g.f. 1/((1-x)*(1-5·x)*(1-10·x)*(1-12·x)). A23947

a(0) = 12; thereafter a(n) is the concatenation of A328991(n),2,A328991(n-1). A328992

n expressed in Fibonacci binary-like number system using only 1's and 2's. A108960

Elements of the Motzkin words sub-operad Motz of TN generated by 00 and 010. A231872