11100505111 has 16 divisors (see below), whose sum is σ = 11679897600. Its totient is φ = 10529358048.

The previous prime is 11100505103. The next prime is 11100505121. The reversal of 11100505111 is 11150500111.

It is not a de Polignac number, because 11100505111 - 2³ = 11100505103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100505121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4081210 + ... + 4083928.

It is an arithmetic number, because the mean of its divisors is an integer number (729993600).

Almost surely, 2^11100505111 is an apocalyptic number.

11100505111 is a deficient number, since it is larger than the sum of its proper divisors (579392489).

11100505111 is a wasteful number, since it uses less digits than its factorization.

11100505111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158.

The product of its (nonzero) digits is 25, while the sum is 16.

Subtracting 11100505111 from its reverse (11150500111), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 11100505111 in words is "eleven billion, one hundred million, five hundred five thousand, one hundred eleven".