Properties of the Number -1211

Two Hundred Eleven

Basics

Value: -1212 → -1211 → -1210

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 5

Digital Root: 5

Palindrome: No

Factorization: 7 × 173

Divisors: 1, 7, 173, 1211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: -10010111011

Octal: -2273

Duodecimal: -84B

Hexadecimal: -4bb

Square: 1466521

Square Root: 34.79942528261063

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

Expansion of 1 - x/(1 - x²/(1 - x³/(1 - x⁴/(1 - x⁵/(1 - x⁶/(1 - ... - xⁿ/(1 - ...))))))), a continued fraction. A291148

Partial alternating sums of the sigma₂ function: a(n) = ∑_k=1..n (-1)^k+1 * sigma₂(k). A379921

Values of n such that L(18) and N(18) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227521

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 221", based on the 5-celled von Neumann neighborhood. A270937

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 275", based on the 5-celled von Neumann neighborhood. A271094

Numbers in base 3. A7089

Integers written in factorial base. A7623

n written in primorial base. A49345

Look and Say sequence: describe the previous term! (method A - initial term is 1). A5150

Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order. A7931