Base | Representation |
---|---|
bin | 1100110111101010110… |
… | …1111101010110011101 |
3 | 210010200222210112012120 |
4 | 3031322231331112131 |
5 | 12110304130401341 |
6 | 245323431253153 |
7 | 21655055456430 |
oct | 3157255752635 |
9 | 703628715176 |
10 | 221102200221 |
11 | 858504785a1 |
12 | 36a2681a1b9 |
13 | 17b08168096 |
14 | a9b6919817 |
15 | 5b40d5d066 |
hex | 337ab7d59d |
221102200221 has 32 divisors (see below), whose sum is σ = 345830446080. Its totient is φ = 123041842176.
The previous prime is 221102200183. The next prime is 221102200259. The reversal of 221102200221 is 122002201122.
It is an interprime number because it is at equal distance from previous prime (221102200183) and next prime (221102200259).
It is not a de Polignac number, because 221102200221 - 29 = 221102199709 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 221102200221.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221102200421) 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, 701316 + ... + 966461.
It is an arithmetic number, because the mean of its divisors is an integer number (10807201440).
Almost surely, 2221102200221 is an apocalyptic number.
221102200221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.
It is an amenable number.
221102200221 is a deficient number, since it is larger than the sum of its proper divisors (124728245859).
221102200221 is a wasteful number, since it uses less digits than its factorization.
221102200221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1667953.
The product of its (nonzero) digits is 64, while the sum is 15.
Adding to 221102200221 its reverse (122002201122), we get a palindrome (343104401343).
Subtracting from 221102200221 its reverse (122002201122), we obtain a palindrome (99099999099).
The spelling of 221102200221 in words is "two hundred twenty-one billion, one hundred two million, two hundred thousand, two hundred twenty-one".
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