| Base | Representation |
|---|---|
| bin | 100100000111111… |
| … | …1000100100101000 |
| 3 | 10010110211020202110 |
| 4 | 1020033320210220 |
| 5 | 4440300422212 |
| 6 | 320140002320 |
| 7 | 42015610362 |
| oct | 11017704450 |
| 9 | 3113736673 |
| 10 | 1212123432 |
| 11 | 572237303 |
| 12 | 299b303a0 |
| 13 | 16417a700 |
| 14 | b6da7d32 |
| 15 | 71632a3c |
| hex | 483f8928 |
1212123432 has 48 divisors (see below), whose sum is σ = 3281351040. Its totient is φ = 372959808.
The previous prime is 1212123389. The next prime is 1212123439. The reversal of 1212123432 is 2343212121.
1212123432 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a nude number because it is divisible by every one of its digits.
It is an alternating number because its digits alternate between odd and even.
It is a junction number, because it is equal to n+sod(n) for n = 1212123399 and 1212123408.
It is not an unprimeable number, because it can be changed into a prime (1212123439) 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 11 ways as a sum of consecutive naturals, for example, 145368 + ... + 153479.
It is an arithmetic number, because the mean of its divisors is an integer number (68361480).
Almost surely, 21212123432 is an apocalyptic number.
1212123432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
1212123432 is an abundant number, since it is smaller than the sum of its proper divisors (2069227608).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1212123432 is a wasteful number, since it uses less digits than its factorization.
1212123432 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 298882 (or 298865 counting only the distinct ones).
The product of its digits is 576, while the sum is 21.
The square root of 1212123432 is about 34815.5630717069. The cubic root of 1212123432 is about 1066.2252151556.
Adding to 1212123432 its reverse (2343212121), we get a palindrome (3555335553).
It can be divided in two parts, 12121 and 23432, that added together give a palindrome (35553).
The spelling of 1212123432 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, four hundred thirty-two".
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