11113231111231 has 2 divisors, whose sum is σ = 11113231111232. Its totient is φ = 11113231111230.

The previous prime is 11113231111117. The next prime is 11113231111249. The reversal of 11113231111231 is 13211113231111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11113231111231 - 2³¹ = 11111083627583 is a prime.

It is a super-2 number, since 2×11113231111231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11113231111531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556615555615 + 5556615555616.

It is an arithmetic number, because the mean of its divisors is an integer number (5556615555616).

Almost surely, 2^{11113231111231} is an apocalyptic number.

11113231111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113231111231 is an equidigital number, since it uses as much as digits as its factorization.

11113231111231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 22.

Adding to 11113231111231 its reverse (13211113231111), we get a palindrome (24324344342342).

The spelling of 11113231111231 in words is "eleven trillion, one hundred thirteen billion, two hundred thirty-one million, one hundred eleven thousand, two hundred thirty-one".