11211111011105 has 16 divisors (see below), whose sum is σ = 13497153116304. Its totient is φ = 8939703179520.

The previous prime is 11211111011081. The next prime is 11211111011129. The reversal of 11211111011105 is 50111011111211.

It is an interprime number because it is at equal distance from previous prime (11211111011081) and next prime (11211111011129).

It can be written as a sum of positive squares in 8 ways, for example, as 3101698634896 + 8109412376209 = 1761164^2 + 2847703^2 .

It is not a de Polignac number, because 11211111011105 - 2⁶ = 11211111011041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520567 + ... + 4973363.

It is an arithmetic number, because the mean of its divisors is an integer number (843572069769).

Almost surely, 2^{11211111011105} is an apocalyptic number.

It is an amenable number.

11211111011105 is a deficient number, since it is larger than the sum of its proper divisors (2286042105199).

11211111011105 is a wasteful number, since it uses less digits than its factorization.

11211111011105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454916.

The product of its (nonzero) digits is 10, while the sum is 17.

Adding to 11211111011105 its reverse (50111011111211), we get a palindrome (61322122122316).

The spelling of 11211111011105 in words is "eleven trillion, two hundred eleven billion, one hundred eleven million, eleven thousand, one hundred five".