201100001 has 2 divisors, whose sum is σ = 201100002. Its totient is φ = 201100000.

The previous prime is 201099937. The next prime is 201100013. The reversal of 201100001 is 100001102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177528976 + 23571025 = 13324^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 201100001 - 2⁶ = 201099937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201100901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550000 + 100550001.

It is an arithmetic number, because the mean of its divisors is an integer number (100550001).

Almost surely, 2^201100001 is an apocalyptic number.

It is an amenable number.

201100001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201100001 is an equidigital number, since it uses as much as digits as its factorization.

201100001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 201100001 is about 14180.9732035569. The cubic root of 201100001 is about 585.8737288454.

Adding to 201100001 its reverse (100001102), we get a palindrome (301101103).

The spelling of 201100001 in words is "two hundred one million, one hundred thousand, one".