| Base | Representation |
|---|---|
| bin | 10100011111011011… |
| … | …11010001010110100 |
| 3 | 1001101200112100112201 |
| 4 | 22033231322022310 |
| 5 | 140012241024340 |
| 6 | 5015343554244 |
| 7 | 536421621361 |
| oct | 121755721264 |
| 9 | 31350470481 |
| 10 | 11001111220 |
| 11 | 4735927760 |
| 12 | 21702bb984 |
| 13 | 1064226388 |
| 14 | 7650bd468 |
| 15 | 445c0d79a |
| hex | 28fb7a2b4 |
11001111220 has 96 divisors (see below), whose sum is σ = 25440210432. Its totient is φ = 3962880000.
The previous prime is 11001111217. The next prime is 11001111229. The reversal of 11001111220 is 2211110011.
It is a Harshad number since it is a multiple of its sum of digits (10).
It is a junction number, because it is equal to n+sod(n) for n = 11001111197 and 11001111206.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11001111229) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17162100 + ... + 17162740.
It is an arithmetic number, because the mean of its divisors is an integer number (265002192).
Almost surely, 211001111220 is an apocalyptic number.
11001111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 11001111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12720105216).
11001111220 is an abundant number, since it is smaller than the sum of its proper divisors (14439099212).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11001111220 is a wasteful number, since it uses less digits than its factorization.
11001111220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1273 (or 1271 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 10.
Adding to 11001111220 its reverse (2211110011), we get a palindrome (13212221231).
It can be divided in two parts, 11001 and 111220, that added together give a palindrome (122221).
The spelling of 11001111220 in words is "eleven billion, one million, one hundred eleven thousand, two hundred twenty".
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