111200121122111 has 24 divisors (see below), whose sum is σ = 129288157683744. Its totient is φ = 93690339560640.

The previous prime is 111200121122099. The next prime is 111200121122131. The reversal of 111200121122111 is 111221121002111.

It is not a de Polignac number, because 111200121122111 - 2²² = 111200116927807 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 111200121122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200121122131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274194161 + ... + 274599413.

It is an arithmetic number, because the mean of its divisors is an integer number (5387006570156).

Almost surely, 2^{111200121122111} is an apocalyptic number.

111200121122111 is a deficient number, since it is larger than the sum of its proper divisors (18088036561633).

111200121122111 is an equidigital number, since it uses as much as digits as its factorization.

111200121122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416639 (or 416580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111200121122111 its reverse (111221121002111), we get a palindrome (222421242124222).

The spelling of 111200121122111 in words is "one hundred eleven trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".