201222021001181 has 2 divisors, whose sum is σ = 201222021001182. Its totient is φ = 201222021001180.

The previous prime is 201222021001097. The next prime is 201222021001223. The reversal of 201222021001181 is 181100120222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141109833229156 + 60112187772025 = 11878966^2 + 7753205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201222021001181 is a prime.

It is a super-2 number, since 2×201222021001181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201222026001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611010500590 + 100611010500591.

It is an arithmetic number, because the mean of its divisors is an integer number (100611010500591).

Almost surely, 2^{201222021001181} is an apocalyptic number.

It is an amenable number.

201222021001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222021001181 is an equidigital number, since it uses as much as digits as its factorization.

201222021001181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 201222021001181 its reverse (181100120222102), we get a palindrome (382322141223283).

The spelling of 201222021001181 in words is "two hundred one trillion, two hundred twenty-two billion, twenty-one million, one thousand, one hundred eighty-one".