111222112200121 has 16 divisors (see below), whose sum is σ = 120589952837760. Its totient is φ = 101970528508800.

The previous prime is 111222112200103. The next prime is 111222112200161. The reversal of 111222112200121 is 121002211222111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111222112200121 - 2¹⁷ = 111222112069049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111222112200161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7947666 + ... + 16899988.

It is an arithmetic number, because the mean of its divisors is an integer number (7536872052360).

Almost surely, 2^{111222112200121} is an apocalyptic number.

It is an amenable number.

111222112200121 is a deficient number, since it is larger than the sum of its proper divisors (9367840637639).

111222112200121 is a wasteful number, since it uses less digits than its factorization.

111222112200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8958816.

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

Adding to 111222112200121 its reverse (121002211222111), we get a palindrome (232224323422232).

The spelling of 111222112200121 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twelve million, two hundred thousand, one hundred twenty-one".