11111099505 has 32 divisors (see below), whose sum is σ = 19425529728. Its totient is φ = 5378419200.

The previous prime is 11111099501. The next prime is 11111099543. The reversal of 11111099505 is 50599011111.

11111099505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11111099505 - 2² = 11111099501 is a prime.

It is a super-2 number, since 2×11111099505² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11111099501) 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 in 31 ways as a sum of consecutive naturals, for example, 47235 + ... + 156375.

It is an arithmetic number, because the mean of its divisors is an integer number (607047804).

Almost surely, 2^11111099505 is an apocalyptic number.

11111099505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11111099505 is a deficient number, since it is larger than the sum of its proper divisors (8314430223).

11111099505 is a wasteful number, since it uses less digits than its factorization.

11111099505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109777.

The product of its (nonzero) digits is 2025, while the sum is 33.

The spelling of 11111099505 in words is "eleven billion, one hundred eleven million, ninety-nine thousand, five hundred five".