221112012221112 has 384 divisors, whose sum is σ = 602862497902080. Its totient is φ = 67433554636800.

The previous prime is 221112012220991. The next prime is 221112012221141. The reversal of 221112012221112 is 211122210211122.

221112012221112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17943028183 + ... + 17943040505.

It is an arithmetic number, because the mean of its divisors is an integer number (1569954421620).

Almost surely, 2^{221112012221112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221112012221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301431248951040).

221112012221112 is an abundant number, since it is smaller than the sum of its proper divisors (381750485680968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221112012221112 is a wasteful number, since it uses less digits than its factorization.

221112012221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815 (or 12770 counting only the distinct ones).

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

Adding to 221112012221112 its reverse (211122210211122), we get a palindrome (432234222432234).

The spelling of 221112012221112 in words is "two hundred twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-one thousand, one hundred twelve".