11212332181 has 2 divisors, whose sum is σ = 11212332182. Its totient is φ = 11212332180.

The previous prime is 11212332163. The next prime is 11212332191. The reversal of 11212332181 is 18123321211.

11212332181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8550700900 + 2661631281 = 92470^2 + 51591^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212332181 - 2⁵ = 11212332149 is a prime.

It is a super-2 number, since 2×11212332181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212332151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606166090 + 5606166091.

It is an arithmetic number, because the mean of its divisors is an integer number (5606166091).

Almost surely, 2^11212332181 is an apocalyptic number.

It is an amenable number.

11212332181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212332181 is an equidigital number, since it uses as much as digits as its factorization.

11212332181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

Adding to 11212332181 its reverse (18123321211), we get a palindrome (29335653392).

The spelling of 11212332181 in words is "eleven billion, two hundred twelve million, three hundred thirty-two thousand, one hundred eighty-one".