11105521611 has 4 divisors (see below), whose sum is σ = 14807362152. Its totient is φ = 7403681072.

The previous prime is 11105521601. The next prime is 11105521631. The reversal of 11105521611 is 11612550111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11105521611 - 2¹⁴ = 11105505227 is a prime.

It is a super-2 number, since 2×11105521611² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11105521601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850920266 + ... + 1850920271.

It is an arithmetic number, because the mean of its divisors is an integer number (3701840538).

Almost surely, 2^11105521611 is an apocalyptic number.

11105521611 is a deficient number, since it is larger than the sum of its proper divisors (3701840541).

11105521611 is an equidigital number, since it uses as much as digits as its factorization.

11105521611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701840540.

The product of its (nonzero) digits is 300, while the sum is 24.

The spelling of 11105521611 in words is "eleven billion, one hundred five million, five hundred twenty-one thousand, six hundred eleven".