111112121211111 has 48 divisors (see below), whose sum is σ = 168310630142304. Its totient is φ = 70566555773952.

The previous prime is 111112121211097. The next prime is 111112121211151.

111112121211111 is a `hidden beast` number, since 111 + 112 + 121 + 211 + 111 = 666.

111112121211111 is nontrivially palindromic in base 10.

111112121211111 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 111112121211111 - 2¹⁹ = 111112120686823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112121211151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13351501 + ... + 20012166.

It is an arithmetic number, because the mean of its divisors is an integer number (3506471461298).

Almost surely, 2^{111112121211111} is an apocalyptic number.

111112121211111 is a deficient number, since it is larger than the sum of its proper divisors (57198508931193).

111112121211111 is a wasteful number, since it uses less digits than its factorization.

111112121211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33363920 (or 33363917 counting only the distinct ones).

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

The spelling of 111112121211111 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, one hundred eleven".