| Base | Representation |
|---|---|
| bin | 111000011001101100… |
| … | …0110000011100110100 |
| 3 | 102120122010221002111200 |
| 4 | 1300303120300130310 |
| 5 | 3441024012242322 |
| 6 | 131350423532500 |
| 7 | 11515332213450 |
| oct | 1606330603464 |
| 9 | 376563832450 |
| 10 | 121121212212 |
| 11 | 47404848490 |
| 12 | 1b5832ba130 |
| 13 | b563584150 |
| 14 | 5c10207660 |
| 15 | 323d62b8ac |
| hex | 1c33630734 |
121121212212 has 288 divisors, whose sum is σ = 422192918784. Its totient is φ = 28254873600.
The previous prime is 121121212207. The next prime is 121121212271. The reversal of 121121212212 is 212212121121.
121121212212 is a `hidden beast` number, since 121 + 121 + 212 + 212 = 666.
121121212212 is digitally balanced in base 3, 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.
It is a congruent number.
It is an unprimeable number.
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 95 ways as a sum of consecutive naturals, for example, 1287912 + ... + 1378752.
Almost surely, 2121121212212 is an apocalyptic number.
121121212212 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 121121212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211096459392).
121121212212 is an abundant number, since it is smaller than the sum of its proper divisors (301071706572).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121121212212 is a wasteful number, since it uses less digits than its factorization.
121121212212 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 90919 (or 90914 counting only the distinct ones).
The product of its digits is 64, while the sum is 18.
Adding to 121121212212 its reverse (212212121121), we get a palindrome (333333333333).
It can be divided in two parts, 121121 and 212212, that added together give a palindrome (333333).
The spelling of 121121212212 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".
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