111200021101121 has 4 divisors (see below), whose sum is σ = 111447682618500. Its totient is φ = 110952359583744.

The previous prime is 111200021101067. The next prime is 111200021101129. The reversal of 111200021101121 is 121101120002111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77575226982400 + 33624794118721 = 8807680^2 + 5798689^2 .

It is a cyclic number.

It is not a de Polignac number, because 111200021101121 - 2¹⁰ = 111200021100097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111200021101096 and 111200021101105.

It is not an unprimeable number, because it can be changed into a prime (111200021101129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123830758016 + ... + 123830758913.

It is an arithmetic number, because the mean of its divisors is an integer number (27861920654625).

Almost surely, 2^{111200021101121} is an apocalyptic number.

It is an amenable number.

111200021101121 is a deficient number, since it is larger than the sum of its proper divisors (247661517379).

111200021101121 is an equidigital number, since it uses as much as digits as its factorization.

111200021101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247661517378.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111200021101121 its reverse (121101120002111), we get a palindrome (232301141103232).

The spelling of 111200021101121 in words is "one hundred eleven trillion, two hundred billion, twenty-one million, one hundred one thousand, one hundred twenty-one".