| Base | Representation |
|---|---|
| bin | 1011110001010000001… |
| … | …1110101000111010101 |
| 3 | 201022220122222211112111 |
| 4 | 2330110003311013111 |
| 5 | 11303101200324341 |
| 6 | 232520035551021 |
| 7 | 20415463510615 |
| oct | 2742403650725 |
| 9 | 638818884474 |
| 10 | 202200011221 |
| 11 | 788306a919a |
| 12 | 3323045b471 |
| 13 | 160b5055970 |
| 14 | 9b02362a45 |
| 15 | 53d6694681 |
| hex | 2f140f51d5 |
202200011221 has 4 divisors (see below), whose sum is σ = 217753858252. Its totient is φ = 186646164192.
The previous prime is 202200011173. The next prime is 202200011257. The reversal of 202200011221 is 122110002202.
It is a happy number.
202200011221 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.
It can be written as a sum of positive squares in 2 ways, for example, as 104174663121 + 98025348100 = 322761^2 + 313090^2 .
It is a cyclic number.
It is not a de Polignac number, because 202200011221 - 213 = 202200003029 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15553847017 = 202200011221 / (2 + 0 + 2 + 2 + 0 + 0 + 0 + 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 (202200011261) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7776923496 + ... + 7776923521.
It is an arithmetic number, because the mean of its divisors is an integer number (54438464563).
Almost surely, 2202200011221 is an apocalyptic number.
It is an amenable number.
202200011221 is a deficient number, since it is larger than the sum of its proper divisors (15553847031).
202200011221 is a wasteful number, since it uses less digits than its factorization.
202200011221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15553847030.
The product of its (nonzero) digits is 32, while the sum is 13.
Adding to 202200011221 its reverse (122110002202), we get a palindrome (324310013423).
The spelling of 202200011221 in words is "two hundred two billion, two hundred million, eleven thousand, two hundred twenty-one".
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