111021112120121 has 8 divisors (see below), whose sum is σ = 126944364631104. Its totient is φ = 95113633018320.

The previous prime is 111021112119991. The next prime is 111021112120129. The reversal of 111021112120121 is 121021211120111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111021112120121 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 111021112120121.

It is not an unprimeable number, because it can be changed into a prime (111021112120129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3943337210 + ... + 3943365363.

It is an arithmetic number, because the mean of its divisors is an integer number (15868045578888).

Almost surely, 2^{111021112120121} is an apocalyptic number.

It is an amenable number.

111021112120121 is a deficient number, since it is larger than the sum of its proper divisors (15923252510983).

111021112120121 is an equidigital number, since it uses as much as digits as its factorization.

111021112120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7886704591.

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

Adding to 111021112120121 its reverse (121021211120111), we get a palindrome (232042323240232).

The spelling of 111021112120121 in words is "one hundred eleven trillion, twenty-one billion, one hundred twelve million, one hundred twenty thousand, one hundred twenty-one".