| Base | Representation |
|---|---|
| bin | 11000011011000111… |
| … | …00000000110011100 |
| 3 | 1020211211010110212100 |
| 4 | 30031203200012130 |
| 5 | 203323222442340 |
| 6 | 10005042205100 |
| 7 | 642635546340 |
| oct | 141543400634 |
| 9 | 36754113770 |
| 10 | 13112312220 |
| 11 | 5619616277 |
| 12 | 265b353790 |
| 13 | 130c736637 |
| 14 | 8c5643620 |
| 15 | 51b239830 |
| hex | 30d8e019c |
13112312220 has 144 divisors (see below), whose sum is σ = 46226718720. Its totient is φ = 2946284928.
The previous prime is 13112312207. The next prime is 13112312221. The reversal of 13112312220 is 2221321131.
13112312220 is a `hidden beast` number, since 131 + 1 + 2 + 312 + 220 = 666.
It is a super-2 number, since 2×131123122202 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 13112312193 and 13112312202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13112312221) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13852 + ... + 162531.
It is an arithmetic number, because the mean of its divisors is an integer number (321018880).
Almost surely, 213112312220 is an apocalyptic number.
13112312220 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 13112312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23113359360).
13112312220 is an abundant number, since it is smaller than the sum of its proper divisors (33114406500).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13112312220 is a wasteful number, since it uses less digits than its factorization.
13112312220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 176464 (or 176459 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 18.
Adding to 13112312220 its reverse (2221321131), we get a palindrome (15333633351).
The spelling of 13112312220 in words is "thirteen billion, one hundred twelve million, three hundred twelve thousand, two hundred twenty".
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