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12200211 = 321355579
BaseRepresentation
bin101110100010…
…100100010011
3211221211112200
4232202210103
511110401321
61113254243
7205462062
oct56424423
924854480
1012200211
116983221
124104383
1326b217a
1418981d9
15110ed26
hexba2913

12200211 has 6 divisors (see below), whose sum is σ = 17622540. Its totient is φ = 8133468.

The previous prime is 12200179. The next prime is 12200239. The reversal of 12200211 is 11200221.

Adding to 12200211 its reverse (11200221), we get a palindrome (23400432).

It is not a de Polignac number, because 12200211 - 25 = 12200179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1355579 = 12200211 / (1 + 2 + 2 + 0 + 0 + 2 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 12200193 and 12200202.

It is not an unprimeable number, because it can be changed into a prime (12200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677781 + ... + 677798.

It is an arithmetic number, because the mean of its divisors is an integer number (2937090).

Almost surely, 212200211 is an apocalyptic number.

12200211 is a deficient number, since it is larger than the sum of its proper divisors (5422329).

12200211 is a wasteful number, since it uses less digits than its factorization.

12200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355585 (or 1355582 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12200211 is about 3492.8800437461. The cubic root of 12200211 is about 230.2090789426.

The spelling of 12200211 in words is "twelve million, two hundred thousand, two hundred eleven".

Divisors: 1 3 9 1355579 4066737 12200211