111120100221121 has 4 divisors (see below), whose sum is σ = 111120122087044. Its totient is φ = 111120078355200.

The previous prime is 111120100221083. The next prime is 111120100221139. The reversal of 111120100221121 is 121122001021111.

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 30450961661121 + 80669138560000 = 5518239^2 + 8981600^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120100221121 - 2⁹ = 111120100220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111120100221095 and 111120100221104.

It is not an unprimeable number, because it can be changed into a prime (111120100221161) 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 3 ways as a sum of consecutive naturals, for example, 1116601 + ... + 14949481.

It is an arithmetic number, because the mean of its divisors is an integer number (27780030521761).

Almost surely, 2^{111120100221121} is an apocalyptic number.

It is an amenable number.

111120100221121 is a deficient number, since it is larger than the sum of its proper divisors (21865923).

111120100221121 is an equidigital number, since it uses as much as digits as its factorization.

111120100221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21865922.

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

Adding to 111120100221121 its reverse (121122001021111), we get a palindrome (232242101242232).

The spelling of 111120100221121 in words is "one hundred eleven trillion, one hundred twenty billion, one hundred million, two hundred twenty-one thousand, one hundred twenty-one".