201010081 has 2 divisors, whose sum is σ = 201010082. Its totient is φ = 201010080.

The previous prime is 201010037. The next prime is 201010097. The reversal of 201010081 is 180010102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135140625 + 65869456 = 11625^2 + 8116^2 .

It is a cyclic number.

It is not a de Polignac number, because 201010081 - 2¹¹ = 201008033 is a prime.

It is a super-2 number, since 2×201010081² = 80810105327253122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505040 + 100505041.

It is an arithmetic number, because the mean of its divisors is an integer number (100505041).

Almost surely, 2^201010081 is an apocalyptic number.

It is an amenable number.

201010081 is a deficient number, since it is larger than the sum of its proper divisors (1).

201010081 is an equidigital number, since it uses as much as digits as its factorization.

201010081 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 13.

The square root of 201010081 is about 14177.8024037578. The cubic root of 201010081 is about 585.7863931592.

Adding to 201010081 its reverse (180010102), we get a palindrome (381020183).

It can be divided in two parts, 20 and 1010081, that added together give a palindrome (1010101).

The spelling of 201010081 in words is "two hundred one million, ten thousand, eighty-one".