Base | Representation |
---|---|
bin | 10111111110010… |
… | …11010111011001 |
3 | 112000102111102121 |
4 | 23333023113121 |
5 | 402441023001 |
6 | 31542301241 |
7 | 4661262310 |
oct | 1377132731 |
9 | 460374377 |
10 | 201111001 |
11 | a3581743 |
12 | 57427821 |
13 | 32885bc0 |
14 | 1c9d1277 |
15 | 129c86a1 |
hex | bfcb5d9 |
201111001 has 8 divisors (see below), whose sum is σ = 247521344. Its totient is φ = 159120720.
The previous prime is 201110993. The next prime is 201111007. The reversal of 201111001 is 100111102.
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 201111001 - 23 = 201110993 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (7).
It is not an unprimeable number, because it can be changed into a prime (201111007) 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 7 ways as a sum of consecutive naturals, for example, 1104915 + ... + 1105096.
It is an arithmetic number, because the mean of its divisors is an integer number (30940168).
Almost surely, 2201111001 is an apocalyptic number.
It is an amenable number.
201111001 is a deficient number, since it is larger than the sum of its proper divisors (46410343).
201111001 is a wasteful number, since it uses less digits than its factorization.
201111001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2210031.
The product of its (nonzero) digits is 2, while the sum is 7.
The square root of 201111001 is about 14181.3610418746. The cubic root of 201111001 is about 585.8844109164.
Adding to 201111001 its reverse (100111102), we get a palindrome (301222103).
It can be divided in two parts, 20111 and 1001, that added together give a palindrome (21112).
The spelling of 201111001 in words is "two hundred one million, one hundred eleven thousand, one".
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