Base | Representation |
---|---|
bin | 1001101001000011110100… |
… | …11001111110010011011001 |
3 | 2210001220002200111002010122 |
4 | 10310201322121332103121 |
5 | 10234333210110432301 |
6 | 113032023035123025 |
7 | 4315536425120435 |
oct | 464417231762331 |
9 | 83056080432118 |
10 | 21202012202201 |
11 | 68347a5175456 |
12 | 2465112ba3475 |
13 | baa458728b1c |
14 | 53427bad99c5 |
15 | 26b7a654481b |
hex | 13487a67e4d9 |
21202012202201 has 24 divisors (see below), whose sum is σ = 22422851848320. Its totient is φ = 20009676589056.
The previous prime is 21202012202183. The next prime is 21202012202213. The reversal of 21202012202201 is 10220221020212.
It is a happy number.
It is not a de Polignac number, because 21202012202201 - 226 = 21201945093337 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 21202012202201.
It is not an unprimeable number, because it can be changed into a prime (21202012205201) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121758740 + ... + 121932746.
It is an arithmetic number, because the mean of its divisors is an integer number (934285493680).
Almost surely, 221202012202201 is an apocalyptic number.
It is an amenable number.
21202012202201 is a deficient number, since it is larger than the sum of its proper divisors (1220839646119).
21202012202201 is an equidigital number, since it uses as much as digits as its factorization.
21202012202201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 174965 (or 174882 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 17.
Adding to 21202012202201 its reverse (10220221020212), we get a palindrome (31422233222413).
The spelling of 21202012202201 in words is "twenty-one trillion, two hundred two billion, twelve million, two hundred two thousand, two hundred one".
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