Base | Representation |
---|---|
bin | 10011110001011011… |
… | …001101101010101011 |
3 | 2000210120120121011211 |
4 | 103301123031222223 |
5 | 321434424441412 |
6 | 13430355133551 |
7 | 1351051450444 |
oct | 236133155253 |
9 | 60716517154 |
10 | 21230312107 |
11 | 9004a59794 |
12 | 4145ba42b7 |
13 | 2004553174 |
14 | 10558662cb |
15 | 843c92ca7 |
hex | 4f16cdaab |
21230312107 has 2 divisors, whose sum is σ = 21230312108. Its totient is φ = 21230312106.
The previous prime is 21230312101. The next prime is 21230312209. The reversal of 21230312107 is 70121303212.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 21230312107 - 23 = 21230312099 is a prime.
It is not a weakly prime, because it can be changed into another prime (21230312101) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615156053 + 10615156054.
It is an arithmetic number, because the mean of its divisors is an integer number (10615156054).
Almost surely, 221230312107 is an apocalyptic number.
21230312107 is a deficient number, since it is larger than the sum of its proper divisors (1).
21230312107 is an equidigital number, since it uses as much as digits as its factorization.
21230312107 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 504, while the sum is 22.
Adding to 21230312107 its reverse (70121303212), we get a palindrome (91351615319).
The spelling of 21230312107 in words is "twenty-one billion, two hundred thirty million, three hundred twelve thousand, one hundred seven".
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