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201222001 is a prime number
BaseRepresentation
bin10111111111001…
…10011101110001
3112000122010200201
423333212131301
5403003101001
631544515201
74662234031
oct1377463561
9460563621
10201222001
11a3648082
125747bb01
13328c4596
141ca1d8c1
15129eb501
hexbfe6771

201222001 has 2 divisors, whose sum is σ = 201222002. Its totient is φ = 201222000.

The previous prime is 201221959. The next prime is 201222011. The reversal of 201222001 is 100222102.

It is an a-pointer prime, because the next prime (201222011) can be obtained adding 201222001 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173606976 + 27615025 = 13176^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 201222001 - 213 = 201213809 is a prime.

It is not a weakly prime, because it can be changed into another prime (201222011) 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 as a sum of consecutive naturals, namely, 100611000 + 100611001.

It is an arithmetic number, because the mean of its divisors is an integer number (100611001).

Almost surely, 2201222001 is an apocalyptic number.

It is an amenable number.

201222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222001 is an equidigital number, since it uses as much as digits as its factorization.

201222001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 201222001 is about 14185.2740897030. The cubic root of 201222001 is about 585.9921809345.

Adding to 201222001 its reverse (100222102), we get a palindrome (301444103).

The spelling of 201222001 in words is "two hundred one million, two hundred twenty-two thousand, one".