11131042123 has 2 divisors, whose sum is σ = 11131042124. Its totient is φ = 11131042122.

The previous prime is 11131041983. The next prime is 11131042133. The reversal of 11131042123 is 32124013111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131042123 - 2²¹ = 11128944971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11131042123.

It is not a weakly prime, because it can be changed into another prime (11131042133) 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, 5565521061 + 5565521062.

It is an arithmetic number, because the mean of its divisors is an integer number (5565521062).

Almost surely, 2^11131042123 is an apocalyptic number.

11131042123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131042123 is an equidigital number, since it uses as much as digits as its factorization.

11131042123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11131042123 its reverse (32124013111), we get a palindrome (43255055234).

The spelling of 11131042123 in words is "eleven billion, one hundred thirty-one million, forty-two thousand, one hundred twenty-three".