111112111220111 has 32 divisors (see below), whose sum is σ = 113332452480000. Its totient is φ = 108920579378688.

The previous prime is 111112111220021. The next prime is 111112111220147. The reversal of 111112111220111 is 111022111211111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111112111220111 - 2²² = 111112107025807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111112111220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112111420111) 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, 16636036670 + ... + 16636043348.

It is an arithmetic number, because the mean of its divisors is an integer number (3541639140000).

Almost surely, 2^{111112111220111} is an apocalyptic number.

111112111220111 is a deficient number, since it is larger than the sum of its proper divisors (2220341259889).

111112111220111 is a wasteful number, since it uses less digits than its factorization.

111112111220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111112111220111 its reverse (111022111211111), we get a palindrome (222134222431222).

The spelling of 111112111220111 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred eleven".