| Base | Representation |
|---|---|
| bin | 10100111000100101… |
| … | …11000101111110000 |
| 3 | 1001221101121021200200 |
| 4 | 22130102320233300 |
| 5 | 140430301200222 |
| 6 | 5052322515200 |
| 7 | 544563354324 |
| oct | 123422705760 |
| 9 | 31841537620 |
| 10 | 11212131312 |
| 11 | 4833a57228 |
| 12 | 220ab05b00 |
| 13 | 1098b6b635 |
| 14 | 78512d984 |
| 15 | 4594e2eac |
| hex | 29c4b8bf0 |
11212131312 has 120 divisors (see below), whose sum is σ = 34122409776. Its totient is φ = 3422435328.
The previous prime is 11212131283. The next prime is 11212131319. The reversal of 11212131312 is 21313121211.
11212131312 is a `hidden beast` number, since 11 + 212 + 131 + 312 = 666.
11212131312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11212131319) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28683 + ... + 152469.
Almost surely, 211212131312 is an apocalyptic number.
11212131312 is a gapful number since it is divisible by the number (12) 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 11212131312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17061204888).
11212131312 is an abundant number, since it is smaller than the sum of its proper divisors (22910278464).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11212131312 is a wasteful number, since it uses less digits than its factorization.
11212131312 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 123855 (or 123846 counting only the distinct ones).
The product of its digits is 72, while the sum is 18.
Adding to 11212131312 its reverse (21313121211), we get a palindrome (32525252523).
The spelling of 11212131312 in words is "eleven billion, two hundred twelve million, one hundred thirty-one thousand, three hundred twelve".
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