1113111511 has 2 divisors, whose sum is σ = 1113111512. Its totient is φ = 1113111510.

The previous prime is 1113111491. The next prime is 1113111529. The reversal of 1113111511 is 1151113111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1113111511 - 2¹¹ = 1113109463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113111541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556555755 + 556555756.

It is an arithmetic number, because the mean of its divisors is an integer number (556555756).

Almost surely, 2^1113111511 is an apocalyptic number.

1113111511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113111511 is an equidigital number, since it uses as much as digits as its factorization.

1113111511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15, while the sum is 16.

The square root of 1113111511 is about 33363.3258384113. The cubic root of 1113111511 is about 1036.3653667629.

Adding to 1113111511 its reverse (1151113111), we get a palindrome (2264224622).

The spelling of 1113111511 in words is "one billion, one hundred thirteen million, one hundred eleven thousand, five hundred eleven".