221211121112 has 16 divisors (see below), whose sum is σ = 417517681200. Its totient is φ = 109873072800.

The previous prime is 221211121099. The next prime is 221211121139. The reversal of 221211121112 is 211121112122.

221211121112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91559687 + ... + 91562102.

It is an arithmetic number, because the mean of its divisors is an integer number (26094855075).

Almost surely, 2^221211121112 is an apocalyptic number.

It is an amenable number.

221211121112 is a deficient number, since it is larger than the sum of its proper divisors (196306560088).

221211121112 is a wasteful number, since it uses less digits than its factorization.

221211121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183121946 (or 183121942 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 221211121112 its reverse (211121112122), we get a palindrome (432332233234).

The spelling of 221211121112 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twelve".