Properties of the Number 1212

One Thousand Two Hundred Twelve

Basics

Value: 1211 → 1212 → 1213

Parity: even

Prime: No

Previous Prime: 1201

Next Prime: 1213

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 101

Divisors: 1, 2, 3, 4, 6, 12, 101, 202, 303, 404

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10010111100

Octal: 2274

Duodecimal: 850

Hexadecimal: 4bc

Square: 1468944

Square Root: 34.813790371058424

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) = ∑_k=0..n p(k) where p(k) = number of partitions of k (A000041). A70

Number of partitions of n into an odd number of parts. A27193

Number of palindromic partitions of n. A25065

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

Numbers that are divisible by the product of their digits. A7602

Doublets: base-10 representation is the juxtaposition of two identical strings. A20338

Number of points on surface of cuboctahedron (or icosahedron): a(0) = 1; for n > 0, a(n) = 10n² + 2. Also coordination sequence for f.c.c. or A₃ or D₃ lattice. A5901

One half of number of non-self-conjugate partitions; also half of number of asymmetric Ferrers graphs with n nodes. A701

Number of partitions of 2n of type EO (see Comments). A236559

Multiples of 12 containing a 12 in their decimal representation. A121032