| Base | Representation |
|---|---|
| bin | 100100000110001… |
| … | …1110101110001000 |
| 3 | 10010102010220201120 |
| 4 | 1020030132232020 |
| 5 | 4440033343422 |
| 6 | 320104515240 |
| 7 | 42005203020 |
| oct | 11014365610 |
| 9 | 3112126646 |
| 10 | 1211231112 |
| 11 | 571787953 |
| 12 | 29977bb20 |
| 13 | 163c27500 |
| 14 | b6c14a80 |
| 15 | 7150845c |
| hex | 4831eb88 |
1211231112 has 192 divisors, whose sum is σ = 3851959680. Its totient is φ = 310542336.
The previous prime is 1211231093. The next prime is 1211231117. The reversal of 1211231112 is 2111321121.
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 junction number, because it is equal to n+sod(n) for n = 1211231091 and 1211231100.
It is not an unprimeable number, because it can be changed into a prime (1211231117) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1049928 + ... + 1051080.
It is an arithmetic number, because the mean of its divisors is an integer number (20062290).
Almost surely, 21211231112 is an apocalyptic number.
1211231112 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 1211231112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1925979840).
1211231112 is an abundant number, since it is smaller than the sum of its proper divisors (2640728568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1211231112 is a wasteful number, since it uses less digits than its factorization.
1211231112 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1232 (or 1215 counting only the distinct ones).
The product of its digits is 24, while the sum is 15.
The square root of 1211231112 is about 34802.7457537476. The cubic root of 1211231112 is about 1065.9635125326.
Adding to 1211231112 its reverse (2111321121), we get a palindrome (3322552233).
Subtracting 1211231112 from its reverse (2111321121), we obtain a palindrome (900090009).
The spelling of 1211231112 in words is "one billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twelve".
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