111102212012221 has 16 divisors (see below), whose sum is σ = 118474121417328. Its totient is φ = 103825325260800.

The previous prime is 111102212012203. The next prime is 111102212012251. The reversal of 111102212012221 is 122210212201111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 22824649575225 + 88277562436996 = 4777515^2 + 9395614^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102212012221 - 2⁷ = 111102212012093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102212012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30788010 + ... + 34206811.

It is an arithmetic number, because the mean of its divisors is an integer number (7404632588583).

Almost surely, 2^{111102212012221} is an apocalyptic number.

It is an amenable number.

111102212012221 is a deficient number, since it is larger than the sum of its proper divisors (7371909405107).

111102212012221 is a wasteful number, since it uses less digits than its factorization.

111102212012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64995552.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111102212012221 its reverse (122210212201111), we get a palindrome (233312424213332).

The spelling of 111102212012221 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, twelve thousand, two hundred twenty-one".