Base | Representation |
---|---|
bin | 1001100110011000101000… |
… | …00001001101011010000101 |
3 | 2202202002212011200121000020 |
4 | 10303030110001031122011 |
5 | 10231331441112334341 |
6 | 112521502432205353 |
7 | 4306103650246656 |
oct | 463142401153205 |
9 | 82662764617006 |
10 | 21110100121221 |
11 | 67a981a1a7651 |
12 | 244b341999859 |
13 | ba189b7331a7 |
14 | 52da3ccab52d |
15 | 2691c73c0566 |
hex | 13331404d685 |
21110100121221 has 16 divisors (see below), whose sum is σ = 28178347538880. Its totient is φ = 14057635207680.
The previous prime is 21110100121157. The next prime is 21110100121259. The reversal of 21110100121221 is 12212100101112.
It is a happy number.
It is not a de Polignac number, because 21110100121221 - 26 = 21110100121157 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 21110100121221.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21110100121021) 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, 8494086 + ... + 10694376.
It is an arithmetic number, because the mean of its divisors is an integer number (1761146721180).
Almost surely, 221110100121221 is an apocalyptic number.
It is an amenable number.
21110100121221 is a deficient number, since it is larger than the sum of its proper divisors (7068247417659).
21110100121221 is a wasteful number, since it uses less digits than its factorization.
21110100121221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2203876.
The product of its (nonzero) digits is 16, while the sum is 15.
Adding to 21110100121221 its reverse (12212100101112), we get a palindrome (33322200222333).
The spelling of 21110100121221 in words is "twenty-one trillion, one hundred ten billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-one".
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