11131230511 has 2 divisors, whose sum is σ = 11131230512. Its totient is φ = 11131230510.

The previous prime is 11131230499. The next prime is 11131230521. The reversal of 11131230511 is 11503213111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131230511 - 2⁹ = 11131229999 is a prime.

It is a super-2 number, since 2×11131230511² (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 (11131230521) 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, 5565615255 + 5565615256.

It is an arithmetic number, because the mean of its divisors is an integer number (5565615256).

Almost surely, 2^11131230511 is an apocalyptic number.

11131230511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131230511 is an equidigital number, since it uses as much as digits as its factorization.

11131230511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

Adding to 11131230511 its reverse (11503213111), we get a palindrome (22634443622).

The spelling of 11131230511 in words is "eleven billion, one hundred thirty-one million, two hundred thirty thousand, five hundred eleven".