111121021201121 has 16 divisors (see below), whose sum is σ = 117297534211200. Its totient is φ = 105268935728880.

The previous prime is 111121021201117. The next prime is 111121021201123. The reversal of 111121021201121 is 121102120121111.

It is not a de Polignac number, because 111121021201121 - 2² = 111121021201117 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 111121021201121.

It is not an unprimeable number, because it can be changed into a prime (111121021201123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211481795 + ... + 212006583.

It is an arithmetic number, because the mean of its divisors is an integer number (7331095888200).

Almost surely, 2^{111121021201121} is an apocalyptic number.

It is an amenable number.

111121021201121 is a deficient number, since it is larger than the sum of its proper divisors (6176513010079).

111121021201121 is an frugal number, since it uses more digits than its factorization.

111121021201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555717 (or 555679 counting only the distinct ones).

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

Adding to 111121021201121 its reverse (121102120121111), we get a palindrome (232223141322232).

The spelling of 111121021201121 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty-one million, two hundred one thousand, one hundred twenty-one".