11166515011111 has 32 divisors (see below), whose sum is σ = 12813243189120. Its totient is φ = 9671124013056.

The previous prime is 11166515011097. The next prime is 11166515011123. The reversal of 11166515011111 is 11111051566111.

It is a cyclic number.

It is not a de Polignac number, because 11166515011111 - 2⁵ = 11166515011079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11166515011151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3048736 + ... + 5623861.

It is an arithmetic number, because the mean of its divisors is an integer number (400413849660).

Almost surely, 2^{11166515011111} is an apocalyptic number.

11166515011111 is a deficient number, since it is larger than the sum of its proper divisors (1646728178009).

11166515011111 is a wasteful number, since it uses less digits than its factorization.

11166515011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8672763.

The product of its (nonzero) digits is 900, while the sum is 31.

Adding to 11166515011111 its reverse (11111051566111), we get a palindrome (22277566577222).

The spelling of 11166515011111 in words is "eleven trillion, one hundred sixty-six billion, five hundred fifteen million, eleven thousand, one hundred eleven".