121112110111 has 16 divisors (see below), whose sum is σ = 127696500000. Its totient is φ = 114697117696.

The previous prime is 121112110081. The next prime is 121112110127. The reversal of 121112110111 is 111011211121.

It is not a de Polignac number, because 121112110111 - 2¹⁵ = 121112077343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121112110091 and 121112110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112110181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689415 + ... + 847063.

It is an arithmetic number, because the mean of its divisors is an integer number (7981031250).

Almost surely, 2^121112110111 is an apocalyptic number.

121112110111 is a deficient number, since it is larger than the sum of its proper divisors (6584389889).

121112110111 is a wasteful number, since it uses less digits than its factorization.

121112110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158186.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121112110111 its reverse (111011211121), we get a palindrome (232123321232).

The spelling of 121112110111 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred eleven".