| Base | Representation |
|---|---|
| bin | 11000011001111001… |
| … | …11110000010010101 |
| 3 | 1020211010010021220021 |
| 4 | 30030330332002111 |
| 5 | 203313131224341 |
| 6 | 10004041505141 |
| 7 | 642453646351 |
| oct | 141474760225 |
| 9 | 36733107807 |
| 10 | 13102211221 |
| 11 | 5613947240 |
| 12 | 2657aa21b1 |
| 13 | 130a60ab08 |
| 14 | 8c4174461 |
| 15 | 51a3e19d1 |
| hex | 30cf3e095 |
13102211221 has 4 divisors (see below), whose sum is σ = 14293321344. Its totient is φ = 11911101100.
The previous prime is 13102211209. The next prime is 13102211231. The reversal of 13102211221 is 12211220131.
13102211221 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, and also an emirpimes, since its reverse is a distinct semiprime: 12211220131 = 11 ⋅1110110921.
It is a cyclic number.
It is not a de Polignac number, because 13102211221 - 25 = 13102211189 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 13102211195 and 13102211204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13102211201) 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, 595555045 + ... + 595555066.
It is an arithmetic number, because the mean of its divisors is an integer number (3573330336).
Almost surely, 213102211221 is an apocalyptic number.
13102211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
13102211221 is a deficient number, since it is larger than the sum of its proper divisors (1191110123).
13102211221 is a wasteful number, since it uses less digits than its factorization.
13102211221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1191110122.
The product of its (nonzero) digits is 48, while the sum is 16.
Adding to 13102211221 its reverse (12211220131), we get a palindrome (25313431352).
The spelling of 13102211221 in words is "thirteen billion, one hundred two million, two hundred eleven thousand, two hundred twenty-one".
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