201202120011181 has 2 divisors, whose sum is σ = 201202120011182. Its totient is φ = 201202120011180.

The previous prime is 201202120011149. The next prime is 201202120011209. The reversal of 201202120011181 is 181110021202102.

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., 180286772722281 + 20915347288900 = 13427091^2 + 4573330^2 .

It is a cyclic number.

It is not a de Polignac number, because 201202120011181 - 2⁵ = 201202120011149 is a prime.

It is a super-2 number, since 2×201202120011181² (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 (201202120711181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100601060005590 + 100601060005591.

It is an arithmetic number, because the mean of its divisors is an integer number (100601060005591).

Almost surely, 2^{201202120011181} is an apocalyptic number.

It is an amenable number.

201202120011181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201202120011181 is an equidigital number, since it uses as much as digits as its factorization.

201202120011181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 201202120011181 its reverse (181110021202102), we get a palindrome (382312141213283).

The spelling of 201202120011181 in words is "two hundred one trillion, two hundred two billion, one hundred twenty million, eleven thousand, one hundred eighty-one".