201112011181 has 2 divisors, whose sum is σ = 201112011182. Its totient is φ = 201112011180.

The previous prime is 201112011103. The next prime is 201112011187. The reversal of 201112011181 is 181110211102.

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., 199161375625 + 1950635556 = 446275^2 + 44166^2 .

It is a cyclic number.

It is not a de Polignac number, because 201112011181 - 2¹⁵ = 201111978413 is a prime.

It is a super-2 number, since 2×201112011181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201112011187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556005590 + 100556005591.

It is an arithmetic number, because the mean of its divisors is an integer number (100556005591).

Almost surely, 2^201112011181 is an apocalyptic number.

It is an amenable number.

201112011181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201112011181 is an equidigital number, since it uses as much as digits as its factorization.

201112011181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 201112011181 its reverse (181110211102), we get a palindrome (382222222283).

The spelling of 201112011181 in words is "two hundred one billion, one hundred twelve million, eleven thousand, one hundred eighty-one".