11105500600991 has 12 divisors (see below), whose sum is σ = 11879326556328. Its totient is φ = 10375614291504.

The previous prime is 11105500600979. The next prime is 11105500601009. The reversal of 11105500600991 is 19900600550111.

It is not a de Polignac number, because 11105500600991 - 2¹⁰ = 11105500599967 is a prime.

It is a super-2 number, since 2×11105500600991² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11105500300991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244086380 + ... + 244131873.

It is an arithmetic number, because the mean of its divisors is an integer number (989943879694).

Almost surely, 2^{11105500600991} is an apocalyptic number.

11105500600991 is a deficient number, since it is larger than the sum of its proper divisors (773825955337).

11105500600991 is an equidigital number, since it uses as much as digits as its factorization.

11105500600991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488218342 (or 488218319 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 38.

The spelling of 11105500600991 in words is "eleven trillion, one hundred five billion, five hundred million, six hundred thousand, nine hundred ninety-one".