201222201020081 has 2 divisors, whose sum is σ = 201222201020082. Its totient is φ = 201222201020080.

The previous prime is 201222201020041. The next prime is 201222201020131. The reversal of 201222201020081 is 180020102222102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186912209069056 + 14309991951025 = 13671584^2 + 3782855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201222201020081 is a prime.

It is a super-2 number, since 2×201222201020081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201222201020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611100510040 + 100611100510041.

It is an arithmetic number, because the mean of its divisors is an integer number (100611100510041).

Almost surely, 2^{201222201020081} is an apocalyptic number.

It is an amenable number.

201222201020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222201020081 is an equidigital number, since it uses as much as digits as its factorization.

201222201020081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 201222201020081 its reverse (180020102222102), we get a palindrome (381242303242183).

The spelling of 201222201020081 in words is "two hundred one trillion, two hundred twenty-two billion, two hundred one million, twenty thousand, eighty-one".