11113243081 has 2 divisors, whose sum is σ = 11113243082. Its totient is φ = 11113243080.

The previous prime is 11113243061. The next prime is 11113243139. The reversal of 11113243081 is 18034231111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10937813056 + 175430025 = 104584^2 + 13245^2 .

It is a cyclic number.

It is not a de Polignac number, because 11113243081 - 2⁵ = 11113243049 is a prime.

It is a super-2 number, since 2×11113243081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11113243061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556621540 + 5556621541.

It is an arithmetic number, because the mean of its divisors is an integer number (5556621541).

Almost surely, 2^11113243081 is an apocalyptic number.

It is an amenable number.

11113243081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113243081 is an equidigital number, since it uses as much as digits as its factorization.

11113243081 is an evil number, because the sum of its binary digits is even.

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

Adding to 11113243081 its reverse (18034231111), we get a palindrome (29147474192).

The spelling of 11113243081 in words is "eleven billion, one hundred thirteen million, two hundred forty-three thousand, eighty-one".