Base | Representation |
---|---|
bin | 1001000110000111001000… |
… | …11111100100001010100101 |
3 | 2121211002121002202022000210 |
4 | 10203003210133210022211 |
5 | 10110144430002210041 |
6 | 110312231444130033 |
7 | 4133016261106623 |
oct | 443034437441245 |
9 | 77732532668023 |
10 | 20001201210021 |
11 | 641150971a999 |
12 | 22b0449996919 |
13 | b2114a10cbb5 |
14 | 4d20c59c4513 |
15 | 24a425560016 |
hex | 1230e47e42a5 |
20001201210021 has 16 divisors (see below), whose sum is σ = 27587992786560. Its totient is φ = 12874276188480.
The previous prime is 20001201209959. The next prime is 20001201210037. The reversal of 20001201210021 is 12001210210002.
It is not a de Polignac number, because 20001201210021 - 237 = 19863762256549 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 20001201209979 and 20001201210006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20001201210521) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25217136 + ... + 25998198.
It is an arithmetic number, because the mean of its divisors is an integer number (1724249549160).
Almost surely, 220001201210021 is an apocalyptic number.
It is an amenable number.
20001201210021 is a deficient number, since it is larger than the sum of its proper divisors (7586791576539).
20001201210021 is a wasteful number, since it uses less digits than its factorization.
20001201210021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1075436.
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 20001201210021 its reverse (12001210210002), we get a palindrome (32002411420023).
The spelling of 20001201210021 in words is "twenty trillion, one billion, two hundred one million, two hundred ten thousand, twenty-one".
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