Base | Representation |
---|---|
bin | 11110111000011101101… |
… | …100011001001111100101 |
3 | 21111212210121022210010102 |
4 | 132320131230121033211 |
5 | 234232242234134341 |
6 | 4302533012433445 |
7 | 306216251354645 |
oct | 36703554311745 |
9 | 7455717283112 |
10 | 2122212021221 |
11 | 7490303a6216 |
12 | 2a3370618885 |
13 | 12517bacb926 |
14 | 74a038c2525 |
15 | 3a30c276c9b |
hex | 1ee1db193e5 |
2122212021221 has 2 divisors, whose sum is σ = 2122212021222. Its totient is φ = 2122212021220.
The previous prime is 2122212021103. The next prime is 2122212021329. The reversal of 2122212021221 is 1221202122212.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1943654222500 + 178557798721 = 1394150^2 + 422561^2 .
It is a cyclic number.
It is not a de Polignac number, because 2122212021221 - 214 = 2122212004837 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 2122212021193 and 2122212021202.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2122212021421) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061106010610 + 1061106010611.
It is an arithmetic number, because the mean of its divisors is an integer number (1061106010611).
Almost surely, 22122212021221 is an apocalyptic number.
It is an amenable number.
2122212021221 is a deficient number, since it is larger than the sum of its proper divisors (1).
2122212021221 is an equidigital number, since it uses as much as digits as its factorization.
2122212021221 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 256, while the sum is 20.
Adding to 2122212021221 its reverse (1221202122212), we get a palindrome (3343414143433).
The spelling of 2122212021221 in words is "two trillion, one hundred twenty-two billion, two hundred twelve million, twenty-one thousand, two hundred twenty-one".
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