11201011181 has 2 divisors, whose sum is σ = 11201011182. Its totient is φ = 11201011180.

The previous prime is 11201011177. The next prime is 11201011183. The reversal of 11201011181 is 18111010211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11032141156 + 168870025 = 105034^2 + 12995^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201011181 - 2² = 11201011177 is a prime.

It is a super-2 number, since 2×11201011181² (a number of 21 digits) contains 22 as substring.

Together with 11201011183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201011183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600505590 + 5600505591.

It is an arithmetic number, because the mean of its divisors is an integer number (5600505591).

Almost surely, 2^11201011181 is an apocalyptic number.

It is an amenable number.

11201011181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201011181 is an equidigital number, since it uses as much as digits as its factorization.

11201011181 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 17.

Adding to 11201011181 its reverse (18111010211), we get a palindrome (29312021392).

The spelling of 11201011181 in words is "eleven billion, two hundred one million, eleven thousand, one hundred eighty-one".