111222102122221 has 8 divisors (see below), whose sum is σ = 111376221413600. Its totient is φ = 111068089529040.

The previous prime is 111222102122171. The next prime is 111222102122251. The reversal of 111222102122221 is 122221201222111.

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

It is a cyclic number.

It is not a de Polignac number, because 111222102122221 - 2¹⁵ = 111222102089453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222102122192 and 111222102122201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222102122251) 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 7 ways as a sum of consecutive naturals, for example, 24588195 + ... + 28758016.

It is an arithmetic number, because the mean of its divisors is an integer number (13922027676700).

Almost surely, 2^{111222102122221} is an apocalyptic number.

It is an amenable number.

111222102122221 is a deficient number, since it is larger than the sum of its proper divisors (154119291379).

111222102122221 is a wasteful number, since it uses less digits than its factorization.

111222102122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53349099.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111222102122221 its reverse (122221201222111), we get a palindrome (233443303344332).

The spelling of 111222102122221 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-one".