111222011122221 has 8 divisors (see below), whose sum is σ = 148345070751360. Its totient is φ = 74123479453952.

The previous prime is 111222011122193. The next prime is 111222011122309. The reversal of 111222011122221 is 122221110222111.

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 111222011122221 - 2⁷ = 111222011122093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222011122021) 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, 6131979636 + ... + 6131997773.

It is an arithmetic number, because the mean of its divisors is an integer number (18543133843920).

Almost surely, 2^{111222011122221} is an apocalyptic number.

It is an amenable number.

111222011122221 is a deficient number, since it is larger than the sum of its proper divisors (37123059629139).

111222011122221 is a wasteful number, since it uses less digits than its factorization.

111222011122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12263980435.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111222011122221 its reverse (122221110222111), we get a palindrome (233443121344332).

The spelling of 111222011122221 in words is "one hundred eleven trillion, two hundred twenty-two billion, eleven million, one hundred twenty-two thousand, two hundred twenty-one".