111121121121111 has 12 divisors (see below), whose sum is σ = 162097477016280. Its totient is φ = 73347274666800.

The previous prime is 111121121121107. The next prime is 111121121121139.

111121121121111 is a `hidden beast` number, since 1 + 111 + 211 + 211 + 21 + 111 = 666.

111121121121111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 111121121121111 - 2² = 111121121121107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121121121151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61122727981 + ... + 61122729798.

It is an arithmetic number, because the mean of its divisors is an integer number (13508123084690).

Almost surely, 2^{111121121121111} is an apocalyptic number.

111121121121111 is a deficient number, since it is larger than the sum of its proper divisors (50976355895169).

111121121121111 is a wasteful number, since it uses less digits than its factorization.

111121121121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122245457886 (or 122245457883 counting only the distinct ones).

The product of its digits is 8, while the sum is 18.

The spelling of 111121121121111 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred eleven".