11505400111 has 2 divisors, whose sum is σ = 11505400112. Its totient is φ = 11505400110.

The previous prime is 11505400069. The next prime is 11505400117. The reversal of 11505400111 is 11100450511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11505400111 - 2²³ = 11497011503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11505400117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752700055 + 5752700056.

It is an arithmetic number, because the mean of its divisors is an integer number (5752700056).

Almost surely, 2^11505400111 is an apocalyptic number.

11505400111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505400111 is an equidigital number, since it uses as much as digits as its factorization.

11505400111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 11505400111 its reverse (11100450511), we get a palindrome (22605850622).

The spelling of 11505400111 in words is "eleven billion, five hundred five million, four hundred thousand, one hundred eleven".