Properties of the Number -121111

One Hundred Twenty-One Thousand One Hundred Eleven

Basics

Value: -121112 → -121111 → -121110

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 281 × 431

Divisors: 1, 281, 431, 121111

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11101100100010111

Octal: -354427

Duodecimal: -5A107

Hexadecimal: -1d917

Square: 14667874321

Square Root: 348.0100573259342

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

Partial sums of A255744. A255765

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

Leftmost 1 is converted to a 2, which then propagates one step at a time until it is rightmost; then it changes to a pair of 1's and the process repeats. A71762

Numbers with digital product = 2. A199986

a(n) = concatenation of decimal expansions of powers of 11 (in decreasing order). A242645

a(1) = 1; a(2) = 2; for n > 2, a(n) is the least number > a(n-1) whose decimal representation is uniquely the concatenation of the decimal representations of two distinct earlier terms. A336528

Numbers n such that sum of digits and product of digits are both prime. A52430

Zero-free numbers with digit sum equal to 7. A119461

Least early bird number of order n. A133652