11130232181 has 2 divisors, whose sum is σ = 11130232182. Its totient is φ = 11130232180.

The previous prime is 11130232147. The next prime is 11130232237. The reversal of 11130232181 is 18123203111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6155187025 + 4975045156 = 78455^2 + 70534^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130232181 - 2¹⁰ = 11130231157 is a prime.

It is a super-2 number, since 2×11130232181² (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 (11130262181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565116090 + 5565116091.

It is an arithmetic number, because the mean of its divisors is an integer number (5565116091).

Almost surely, 2^11130232181 is an apocalyptic number.

It is an amenable number.

11130232181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11130232181 is an equidigital number, since it uses as much as digits as its factorization.

11130232181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 11130232181 its reverse (18123203111), we get a palindrome (29253435292).

The spelling of 11130232181 in words is "eleven billion, one hundred thirty million, two hundred thirty-two thousand, one hundred eighty-one".