111222121110221 has 8 divisors (see below), whose sum is σ = 121335405125088. Its totient is φ = 101109200778000.

The previous prime is 111222121110211. The next prime is 111222121110223. The reversal of 111222121110221 is 122011121222111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222121110221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111222121110193 and 111222121110202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222121110223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90281015 + ... + 91504676.

It is an arithmetic number, because the mean of its divisors is an integer number (15166925640636).

Almost surely, 2^{111222121110221} is an apocalyptic number.

111222121110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111222121110221 is a deficient number, since it is larger than the sum of its proper divisors (10113284014867).

111222121110221 is a wasteful number, since it uses less digits than its factorization.

111222121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181841323.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111222121110221 its reverse (122011121222111), we get a palindrome (233233242332332).

The spelling of 111222121110221 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".