Base | Representation |
---|---|
bin | 11011100011111111110111… |
… | …010000001011110011011101 |
3 | 120220012121121121220101210022 |
4 | 123203333313100023303131 |
5 | 111342041112103210023 |
6 | 1105452055135121525 |
7 | 34350633431550620 |
oct | 3343776720136335 |
9 | 526177547811708 |
10 | 121221010210013 |
11 | 356965a604702a |
12 | 1171953b0732a5 |
13 | 52841277927bc |
14 | 21d11b1ac7db7 |
15 | e03383b087c8 |
hex | 6e3ff740bcdd |
121221010210013 has 4 divisors (see below), whose sum is σ = 138538297382880. Its totient is φ = 103903723037148.
The previous prime is 121221010209997. The next prime is 121221010210073. The reversal of 121221010210013 is 310012010122121.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 121221010210013 - 24 = 121221010209997 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 121221010209973 and 121221010210000.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121221010210073) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658643586423 + ... + 8658643586436.
It is an arithmetic number, because the mean of its divisors is an integer number (34634574345720).
Almost surely, 2121221010210013 is an apocalyptic number.
It is an amenable number.
121221010210013 is a deficient number, since it is larger than the sum of its proper divisors (17317287172867).
121221010210013 is an equidigital number, since it uses as much as digits as its factorization.
121221010210013 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 17317287172866.
The product of its (nonzero) digits is 48, while the sum is 17.
Adding to 121221010210013 its reverse (310012010122121), we get a palindrome (431233020332134).
The spelling of 121221010210013 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, ten million, two hundred ten thousand, thirteen".
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