Base | Representation |
---|---|
bin | 10010110111101111… |
… | …11011100101010101 |
3 | 222011001212112201101 |
4 | 21123313323211111 |
5 | 131222104320341 |
6 | 4353153230101 |
7 | 506030553325 |
oct | 113367734525 |
9 | 28131775641 |
10 | 10131323221 |
11 | 43299600a8 |
12 | 1b68b62331 |
13 | c55c7a316 |
14 | 6c1789285 |
15 | 3e469d831 |
hex | 25bdfb955 |
10131323221 has 2 divisors, whose sum is σ = 10131323222. Its totient is φ = 10131323220.
The previous prime is 10131323219. The next prime is 10131323269. The reversal of 10131323221 is 12232313101.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 7723948996 + 2407374225 = 87886^2 + 49065^2 .
It is an emirp because it is prime and its reverse (12232313101) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 10131323221 - 21 = 10131323219 is a prime.
Together with 10131323219, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (10131323201) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065661610 + 5065661611.
It is an arithmetic number, because the mean of its divisors is an integer number (5065661611).
Almost surely, 210131323221 is an apocalyptic number.
It is an amenable number.
10131323221 is a deficient number, since it is larger than the sum of its proper divisors (1).
10131323221 is an equidigital number, since it uses as much as digits as its factorization.
10131323221 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 216, while the sum is 19.
Adding to 10131323221 its reverse (12232313101), we get a palindrome (22363636322).
The spelling of 10131323221 in words is "ten billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty-one".
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