11215311105 has 16 divisors (see below), whose sum is σ = 17960589504. Its totient is φ = 5976135360.

The previous prime is 11215311103. The next prime is 11215311109. The reversal of 11215311105 is 50111351211.

It is not a de Polignac number, because 11215311105 - 2¹ = 11215311103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215311103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317931 + ... + 351440.

It is an arithmetic number, because the mean of its divisors is an integer number (1122536844).

Almost surely, 2^11215311105 is an apocalyptic number.

11215311105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11215311105 is a deficient number, since it is larger than the sum of its proper divisors (6745278399).

11215311105 is a wasteful number, since it uses less digits than its factorization.

11215311105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670496.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 11215311105 its reverse (50111351211), we get a palindrome (61326662316).

The spelling of 11215311105 in words is "eleven billion, two hundred fifteen million, three hundred eleven thousand, one hundred five".