111110121022221 has 12 divisors (see below), whose sum is σ = 160493258797248. Its totient is φ = 74073016277064.

The previous prime is 111110121022171. The next prime is 111110121022223. The reversal of 111110121022221 is 122220121011111.

It is a happy number.

111110121022221 is a `hidden beast` number, since 1 + 111 + 101 + 210 + 22 + 221 = 666.

It is not a de Polignac number, because 111110121022221 - 2⁷ = 111110121022093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111110121022194 and 111110121022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110121022223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31370565 + ... + 34732298.

It is an arithmetic number, because the mean of its divisors is an integer number (13374438233104).

Almost surely, 2^{111110121022221} is an apocalyptic number.

It is an amenable number.

111110121022221 is a deficient number, since it is larger than the sum of its proper divisors (49383137775027).

111110121022221 is a wasteful number, since it uses less digits than its factorization.

111110121022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66289632 (or 66289629 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111110121022221 its reverse (122220121011111), we get a palindrome (233330242033332).

The spelling of 111110121022221 in words is "one hundred eleven trillion, one hundred ten billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-one".