| Base | Representation |
|---|---|
| bin | 11001000000001011… |
| … | …10111100101110101 |
| 3 | 1021122111022212021212 |
| 4 | 30200011313211311 |
| 5 | 204442331424341 |
| 6 | 10055552051205 |
| 7 | 653433156065 |
| oct | 144005674565 |
| 9 | 37574285255 |
| 10 | 13423311221 |
| 11 | 5769122441 |
| 12 | 2727533b05 |
| 13 | 135bcb5908 |
| 14 | 914a7b3a5 |
| 15 | 5386bc5eb |
| hex | 320177975 |
13423311221 has 4 divisors (see below), whose sum is σ = 14006933472. Its totient is φ = 12839688972.
The previous prime is 13423311217. The next prime is 13423311227. The reversal of 13423311221 is 12211332431.
13423311221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 13423311221 - 22 = 13423311217 is a prime.
It is a super-3 number, since 3×134233112213 (a number of 31 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 583622227 = 13423311221 / (1 + 3 + 4 + 2 + 3 + 3 + 1 + 1 + 2 + 2 + 1).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13423311227) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291811091 + ... + 291811136.
It is an arithmetic number, because the mean of its divisors is an integer number (3501733368).
Almost surely, 213423311221 is an apocalyptic number.
It is an amenable number.
13423311221 is a deficient number, since it is larger than the sum of its proper divisors (583622251).
13423311221 is an equidigital number, since it uses as much as digits as its factorization.
13423311221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 583622250.
The product of its digits is 864, while the sum is 23.
Adding to 13423311221 its reverse (12211332431), we get a palindrome (25634643652).
The spelling of 13423311221 in words is "thirteen billion, four hundred twenty-three million, three hundred eleven thousand, two hundred twenty-one".
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