111011121112221 has 12 divisors (see below), whose sum is σ = 174926615086080. Its totient is φ = 67279467340680.

The previous prime is 111011121112193. The next prime is 111011121112267. The reversal of 111011121112221 is 122211121110111.

111011121112221 is a `hidden beast` number, since 1 + 110 + 111 + 211 + 12 + 221 = 666.

It is not a de Polignac number, because 111011121112221 - 2¹⁴ = 111011121095837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111011121112194 and 111011121112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011121112271) 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, 560662227741 + ... + 560662227938.

It is an arithmetic number, because the mean of its divisors is an integer number (14577217923840).

Almost surely, 2^{111011121112221} is an apocalyptic number.

111011121112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111011121112221 is a deficient number, since it is larger than the sum of its proper divisors (63915493973859).

111011121112221 is a wasteful number, since it uses less digits than its factorization.

111011121112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121324455696 (or 1121324455693 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111011121112221 its reverse (122211121110111), we get a palindrome (233222242222332).

The spelling of 111011121112221 in words is "one hundred eleven trillion, eleven billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".