Base | Representation |
---|---|
bin | 110010010001100101110110… |
… | …100110001111010011011101 |
3 | 1001222220000122210000012221021 |
4 | 302101211312212033103131 |
5 | 212440141214440213041 |
6 | 2102133030011404141 |
7 | 64400520455011240 |
oct | 6221456646172335 |
9 | 1058800583005837 |
10 | 221111201101021 |
11 | 644a8808734360 |
12 | 209709b9a53651 |
13 | 964b909b269ba |
14 | 3c85ba6c07257 |
15 | 1a86922e3acd1 |
hex | c9197698f4dd |
221111201101021 has 32 divisors (see below), whose sum is σ = 278777912544000. Its totient is φ = 170352819732480.
The previous prime is 221111201100941. The next prime is 221111201101033. The reversal of 221111201101021 is 120101102111122.
It is not a de Polignac number, because 221111201101021 - 211 = 221111201098973 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 221111201100986 and 221111201101004.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221111201102021) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209126505 + ... + 210181153.
It is an arithmetic number, because the mean of its divisors is an integer number (8711809767000).
Almost surely, 2221111201101021 is an apocalyptic number.
It is an amenable number.
221111201101021 is a deficient number, since it is larger than the sum of its proper divisors (57666711442979).
221111201101021 is a wasteful number, since it uses less digits than its factorization.
221111201101021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1085349.
The product of its (nonzero) digits is 16, while the sum is 16.
Adding to 221111201101021 its reverse (120101102111122), we get a palindrome (341212303212143).
The spelling of 221111201101021 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one hundred one thousand, twenty-one".
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