1011
The Lockheed L-1011 TriStar had an autoland system ahead of its rivals.
- Odd
- Composite
Where 1011 fits
Why 1011 is special
It could land itself in conditions that grounded its competitors, and it still lost the market to the DC-10 because it arrived late after its engine supplier collapsed.
Factors & digit properties
- Divisors (4)
- 1, 3, 337, 1011
- Prime factorisation
- 3 × 337
- Digit sum
- 3
- Digital root
- 3
Representations
- Decimal
- 1011
- Scientific notation
- 1.011 × 10^3
Roman numerals
M X I
Binary
1 1 1 1 1 1 0 0 1 1
1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,011
Octal
1 7 6 3
1 × 512 + 7 × 64 + 6 × 8 + 3 × 1 = 1,011
Hexadecimal
3 f 3
3 × 256 + f × 16 + 3 × 1 = 1,011
Read as powers of two: 512 + 256 + 128 + 64 + 32 + 16 + 2 + 1 = 1,011.
In historical numeral systems
Egyptian
1 lotus, 1 hobble, 1 stroke
1 × 1,000 + 1 × 10 + 1 × 1 = 1,011. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 6 vertical wedges (sixties place), 5 corner wedges + 1 vertical wedge (units place)
16 × 60 + 51 = 1011. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Semiprime
- Harshad (Niven) number
- Lucky number (mathematical sieve)
Related numbers & connections
The TriStar could land itself in conditions that grounded rivals and still lost the market after its engine supplier collapsed.
View 747 →Technology & computing
The Lockheed L-1011 entered service in 1972 with an advanced autopilot capable of automatic landing. Delays caused by Rolls-Royce's 1971 bankruptcy allowed the competing DC-10 to reach airlines first.
DocumentedTechnology & computingGeography: United StatesPeriod: 1972–1984
Common questions
Is 1011 a prime number?
No, 1011 is not prime.
What are the factors of 1011?
The factors of 1011 are 1, 3, 337, 1011.
What is 1011 in Roman numerals?
1011 in Roman numerals is MXI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026