111102121221121 has 4 divisors (see below), whose sum is σ = 111373764549700. Its totient is φ = 110830477892544.

The previous prime is 111102121221083. The next prime is 111102121221163. The reversal of 111102121221121 is 121122121201111.

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 60294293203600 + 50807828017521 = 7764940^2 + 7127961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102121221121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111102121821121) 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, 135821663676 + ... + 135821664493.

It is an arithmetic number, because the mean of its divisors is an integer number (27843441137425).

Almost surely, 2^{111102121221121} is an apocalyptic number.

It is an amenable number.

111102121221121 is a deficient number, since it is larger than the sum of its proper divisors (271643328579).

111102121221121 is an equidigital number, since it uses as much as digits as its factorization.

111102121221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271643328578.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111102121221121 its reverse (121122121201111), we get a palindrome (232224242422232).

The spelling of 111102121221121 in words is "one hundred eleven trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".