1,911
1,911 is a composite number, odd, a calendar year.
Notable events — 1911 AD
- Mar 25 The Triangle Shirtwaist factory fire in New York kills 146 garment workers.
- Jul 24 Hiram Bingham reaches Machu Picchu, bringing it to global attention.
- Oct 10 The Wuchang Uprising launches the Xinhai Revolution that topples China's Qing dynasty.
- Dec 14 Roald Amundsen's expedition becomes the first to reach the South Pole.
- Dec 29 Sun Yat-sen is elected provisional president of the new Republic of China.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Sunday
January 1, 1911
- Ended on
-
Sunday
December 31, 1911
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 16
Sunday, April 16, 1911
- Decade
-
1910s
1910–1919
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
115
115 years before 2026.
In other calendars
- Hebrew
-
5671 / 5672 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1329 / 1330 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Pig
Sexagenary cycle position 48 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2454 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1289 / 1290 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1903 / 1904 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1833 / 1832 Saka
Indian national calendar; year starts in March.
- Japanese
-
Meiji 44
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 12
- Digit product
- 9
- Digital root
- 3
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 1,191
- Flips to (rotate 180°)
- 1,161
- Recamán's sequence
- a(7,922) = 1,911
- Square (n²)
- 3,651,921
- Cube (n³)
- 6,978,821,031
- Divisor count
- 12
- σ(n) — sum of divisors
- 3,192
- φ(n) — Euler's totient
- 1,008
- Sum of prime factors
- 30
Primality
Prime factorization: 3 × 7 2 × 13
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred eleven
- Ordinal
- 1911th
- Roman numeral
- MCMXI
- Binary
- 11101110111
- Octal
- 3567
- Hexadecimal
- 0x777
- Base64
- B3c=
- One's complement
- 63,624 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺
- Greek (Milesian)
- ͵αϡιαʹ
- Mayan (base 20)
- 𝋤·𝋯·𝋫
- Chinese
- 一千九百一十一
- Chinese (financial)
- 壹仟玖佰壹拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,911 = 2
- e — Euler's number (e)
- Digit 1,911 = 2
- φ — Golden ratio (φ)
- Digit 1,911 = 0
- √2 — Pythagoras's (√2)
- Digit 1,911 = 4
- ln 2 — Natural log of 2
- Digit 1,911 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,911 = 0
Also seen as
UTF-8 encoding: DD B7 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.119.
- Address
- 0.0.7.119
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.119
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1911 first appears in π at position 2,902 of the decimal expansion (the 2,902ordinal-suffix:nd 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.