11112111121111 has 32 divisors (see below), whose sum is σ = 14926026963456. Its totient is φ = 7989368688000.

The previous prime is 11112111121091. The next prime is 11112111121121.

11112111121111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11112111121111 - 2³⁷ = 10974672167639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111121121) 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, 52216 + ... + 4714546.

It is an arithmetic number, because the mean of its divisors is an integer number (466438342608).

Almost surely, 2^{11112111121111} is an apocalyptic number.

11112111121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11112111121111 is a deficient number, since it is larger than the sum of its proper divisors (3813915842345).

11112111121111 is a wasteful number, since it uses less digits than its factorization.

11112111121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664743.

The product of its digits is 4, while the sum is 16.

It can be divided in two parts, 1111211 and 1121111, that added together give a palindrome (2232322).

The spelling of 11112111121111 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eleven".