111220221112 has 256 divisors, whose sum is σ = 298316390400. Its totient is φ = 37433249280.

The previous prime is 111220221107. The next prime is 111220221121. The reversal of 111220221112 is 211122022111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12624213 + ... + 12633019.

It is an arithmetic number, because the mean of its divisors is an integer number (1165298400).

Almost surely, 2^111220221112 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 111220221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149158195200).

111220221112 is an abundant number, since it is smaller than the sum of its proper divisors (187096169288).

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

111220221112 is a wasteful number, since it uses less digits than its factorization.

111220221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946 (or 8942 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220221112 its reverse (211122022111), we get a palindrome (322342243223).

It can be divided in two parts, 11122022111 and 2, that multiplied together give a palindrome (22244044222).

The spelling of 111220221112 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twelve".