Base | Representation |
---|---|
bin | 1100010110100101111… |
… | …1010101100100110101 |
3 | 202021210012102121011001 |
4 | 3011221133111210311 |
5 | 11434113121020041 |
6 | 241254412043301 |
7 | 21222042414661 |
oct | 3055137254465 |
9 | 667705377131 |
10 | 212223220021 |
11 | 8200452532a |
12 | 35169163531 |
13 | 170217aac47 |
14 | a3b36078a1 |
15 | 57c15d9131 |
hex | 31697d5935 |
212223220021 has 8 divisors (see below), whose sum is σ = 223399051200. Its totient is φ = 201048007680.
The previous prime is 212223219997. The next prime is 212223220051. The reversal of 212223220021 is 120022322212.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 212223220021 - 229 = 211686349109 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (19).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212223220051) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659016 + ... + 926686.
It is an arithmetic number, because the mean of its divisors is an integer number (27924881400).
Almost surely, 2212223220021 is an apocalyptic number.
It is an amenable number.
212223220021 is a deficient number, since it is larger than the sum of its proper divisors (11175831179).
212223220021 is a wasteful number, since it uses less digits than its factorization.
212223220021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 309419.
The product of its (nonzero) digits is 384, while the sum is 19.
Adding to 212223220021 its reverse (120022322212), we get a palindrome (332245542233).
The spelling of 212223220021 in words is "two hundred twelve billion, two hundred twenty-three million, two hundred twenty thousand, twenty-one".
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