111222102121 has 8 divisors (see below), whose sum is σ = 119829825864. Its totient is φ = 102621832320.

The previous prime is 111222102119. The next prime is 111222102127. The reversal of 111222102121 is 121201222111.

It can be written as a sum of positive squares in 4 ways, for example, as 6999664896 + 104222437225 = 83664^2 + 322835^2 .

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 111222102121 - 2¹ = 111222102119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222102095 and 111222102104.

It is not an unprimeable number, because it can be changed into a prime (111222102127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832470 + ... + 1892191.

It is an arithmetic number, because the mean of its divisors is an integer number (14978728233).

Almost surely, 2^111222102121 is an apocalyptic number.

It is an amenable number.

111222102121 is a deficient number, since it is larger than the sum of its proper divisors (8607723743).

111222102121 is a wasteful number, since it uses less digits than its factorization.

111222102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726971.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111222102121 its reverse (121201222111), we get a palindrome (232423324232).

The spelling of 111222102121 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred two thousand, one hundred twenty-one".