Base | Representation |
---|---|
bin | 10111111111011100… |
… | …00001101010011111 |
3 | 1020020122100110012012 |
4 | 23333232001222133 |
5 | 202334312040421 |
6 | 5530031101435 |
7 | 634116544445 |
oct | 137756015237 |
9 | 36218313165 |
10 | 12880190111 |
11 | 550a593518 |
12 | 25b567187b |
13 | 12a3613489 |
14 | 8a289cb95 |
15 | 505b8795b |
hex | 2ffb81a9f |
12880190111 has 2 divisors, whose sum is σ = 12880190112. Its totient is φ = 12880190110.
The previous prime is 12880190107. The next prime is 12880190119. The reversal of 12880190111 is 11109108821.
It is a weak prime.
It is an emirp because it is prime and its reverse (11109108821) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12880190111 - 22 = 12880190107 is a prime.
It is a Sophie Germain prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12880190119) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6440095055 + 6440095056.
It is an arithmetic number, because the mean of its divisors is an integer number (6440095056).
Almost surely, 212880190111 is an apocalyptic number.
12880190111 is a deficient number, since it is larger than the sum of its proper divisors (1).
12880190111 is an equidigital number, since it uses as much as digits as its factorization.
12880190111 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1152, while the sum is 32.
Adding to 12880190111 its reverse (11109108821), we get a palindrome (23989298932).
The spelling of 12880190111 in words is "twelve billion, eight hundred eighty million, one hundred ninety thousand, one hundred eleven".
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