1,212
1,212 is a composite number, even, a calendar year.
Notable events — 1212 AD
- Jul 16 Christian armies defeat the Almohads at Las Navas de Tolosa, decisive turning point of the Reconquista.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Leap year
Divisible by 4 and not by 100; February has 29 days.
- Days in year
- 366
- ISO weeks
- 52
- Started on
-
Sunday
January 1, 1212
- Ended on
-
Monday
December 31, 1212
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1210s
1210–1219
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
814
814 years before 2026.
In other calendars
- Hebrew
-
4972 / 4973 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
608 / 609 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Monkey
Sexagenary cycle position 9 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1755 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
590 / 591 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1204 / 1205 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1134 / 1133 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 6
- Digit product
- 4
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 2,121
- Recamán's sequence
- a(8,564) = 1,212
- Square (n²)
- 1,468,944
- Cube (n³)
- 1,780,360,128
- Divisor count
- 12
- σ(n) — sum of divisors
- 2,856
- φ(n) — Euler's totient
- 400
- Sum of prime factors
- 108
Primality
Prime factorization: 2 2 × 3 × 101
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred twelve
- Ordinal
- 1212th
- Roman numeral
- MCCXII
- Binary
- 10010111100
- Octal
- 2274
- Hexadecimal
- 0x4BC
- Base64
- BLw=
- One's complement
- 64,323 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋 𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓏺𓏺
- Greek (Milesian)
- ͵ασιβʹ
- Mayan (base 20)
- 𝋣·𝋠·𝋬
- Chinese
- 一千二百一十二
- Chinese (financial)
- 壹仟貳佰壹拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,212 = 6
- e — Euler's number (e)
- Digit 1,212 = 5
- φ — Golden ratio (φ)
- Digit 1,212 = 2
- √2 — Pythagoras's (√2)
- Digit 1,212 = 5
- ln 2 — Natural log of 2
- Digit 1,212 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,212 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1212, here are decompositions:
- 11 + 1201 = 1212
- 19 + 1193 = 1212
- 31 + 1181 = 1212
- 41 + 1171 = 1212
- 59 + 1153 = 1212
- 61 + 1151 = 1212
- 83 + 1129 = 1212
- 89 + 1123 = 1212
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 BC (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.188.
- Address
- 0.0.4.188
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.188
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1212 first appears in π at position 710 of the decimal expansion (the 710ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.