Base | Representation |
---|---|
bin | 1001101001100111011001… |
… | …10101111011001011100101 |
3 | 2210010201101210010101211112 |
4 | 10310303230311323023211 |
5 | 10240141314133020003 |
6 | 113044502210114405 |
7 | 4320113636540663 |
oct | 464635465731345 |
9 | 83121353111745 |
10 | 21221112001253 |
11 | 684190654514a |
12 | 246896357ba05 |
13 | bac1b0769778 |
14 | 535170611c33 |
15 | 26c0232443d8 |
hex | 134cecd7b2e5 |
21221112001253 has 2 divisors, whose sum is σ = 21221112001254. Its totient is φ = 21221112001252.
The previous prime is 21221112001097. The next prime is 21221112001301. The reversal of 21221112001253 is 35210021112212.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 17054116493569 + 4166995507684 = 4129663^2 + 2041322^2 .
It is a cyclic number.
It is not a de Polignac number, because 21221112001253 - 218 = 21221111739109 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (21221112001853) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610556000626 + 10610556000627.
It is an arithmetic number, because the mean of its divisors is an integer number (10610556000627).
Almost surely, 221221112001253 is an apocalyptic number.
It is an amenable number.
21221112001253 is a deficient number, since it is larger than the sum of its proper divisors (1).
21221112001253 is an equidigital number, since it uses as much as digits as its factorization.
21221112001253 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 480, while the sum is 23.
Adding to 21221112001253 its reverse (35210021112212), we get a palindrome (56431133113465).
The spelling of 21221112001253 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, two hundred fifty-three".
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