Base | Representation |
---|---|
bin | 101110001100… |
… | …011111110011 |
3 | 211210020112112 |
4 | 232030133303 |
5 | 11100003221 |
6 | 1111315535 |
7 | 204634400 |
oct | 56143763 |
9 | 24706475 |
10 | 12109811 |
11 | 692130a |
12 | 407bbab |
13 | 267cc8c |
14 | 18732a7 |
15 | 10e315b |
hex | b8c7f3 |
12109811 has 12 divisors (see below), whose sum is σ = 14355792. Its totient is φ = 10181808.
The previous prime is 12109697. The next prime is 12109817. The reversal of 12109811 is 11890121.
It is not a de Polignac number, because 12109811 - 222 = 7915507 is a prime.
It is not an unprimeable number, because it can be changed into a prime (12109817) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266 + ... + 4928.
It is an arithmetic number, because the mean of its divisors is an integer number (1196316).
Almost surely, 212109811 is an apocalyptic number.
12109811 is a deficient number, since it is larger than the sum of its proper divisors (2245981).
12109811 is an equidigital number, since it uses as much as digits as its factorization.
12109811 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4730 (or 4723 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 23.
The square root of 12109811 is about 3479.9153725342. The cubic root of 12109811 is about 229.6390747496.
Adding to 12109811 its reverse (11890121), we get a palindrome (23999932).
The spelling of 12109811 in words is "twelve million, one hundred nine thousand, eight hundred eleven".
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