11101006505 has 4 divisors (see below), whose sum is σ = 13321207812. Its totient is φ = 8880805200.

The previous prime is 11101006471. The next prime is 11101006513. The reversal of 11101006505 is 50560010111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2675785984 + 8425220521 = 51728^2 + 91789^2 .

It is not a de Polignac number, because 11101006505 - 2²² = 11096812201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110100646 + ... + 1110100655.

It is an arithmetic number, because the mean of its divisors is an integer number (3330301953).

Almost surely, 2^11101006505 is an apocalyptic number.

It is an amenable number.

11101006505 is a deficient number, since it is larger than the sum of its proper divisors (2220201307).

11101006505 is an equidigital number, since it uses as much as digits as its factorization.

11101006505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220201306.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 11101006505 its reverse (50560010111), we get a palindrome (61661016616).

The spelling of 11101006505 in words is "eleven billion, one hundred one million, six thousand, five hundred five".