11242431181 has 2 divisors, whose sum is σ = 11242431182. Its totient is φ = 11242431180.

The previous prime is 11242431173. The next prime is 11242431197. The reversal of 11242431181 is 18113424211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7912102500 + 3330328681 = 88950^2 + 57709^2 .

It is a cyclic number.

It is not a de Polignac number, because 11242431181 - 2³ = 11242431173 is a prime.

It is a super-2 number, since 2×11242431181² (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 (11242431581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621215590 + 5621215591.

It is an arithmetic number, because the mean of its divisors is an integer number (5621215591).

Almost surely, 2^11242431181 is an apocalyptic number.

It is an amenable number.

11242431181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11242431181 is an equidigital number, since it uses as much as digits as its factorization.

11242431181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

Adding to 11242431181 its reverse (18113424211), we get a palindrome (29355855392).

The spelling of 11242431181 in words is "eleven billion, two hundred forty-two million, four hundred thirty-one thousand, one hundred eighty-one".