111121120112111 has 8 divisors (see below), whose sum is σ = 121453064866944. Its totient is φ = 101210887388160.

The previous prime is 111121120112089. The next prime is 111121120112141. The reversal of 111121120112111 is 111211021121111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111121120112111 - 2¹⁸ = 111121119849967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 111121120112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121120112141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105428007170 + ... + 105428008223.

It is an arithmetic number, because the mean of its divisors is an integer number (15181633108368).

Almost surely, 2^{111121120112111} is an apocalyptic number.

111121120112111 is a deficient number, since it is larger than the sum of its proper divisors (10331944754833).

111121120112111 is a wasteful number, since it uses less digits than its factorization.

111121120112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210856015441.

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

Adding to 111121120112111 its reverse (111211021121111), we get a palindrome (222332141233222).

The spelling of 111121120112111 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twelve thousand, one hundred eleven".