111220100221100 has 216 divisors, whose sum is σ = 264017463332112. Its totient is φ = 40645577856000.

The previous prime is 111220100221063. The next prime is 111220100221117. The reversal of 111220100221100 is 1122001022111.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6030468479 + ... + 6030486921.

It is an arithmetic number, because the mean of its divisors is an integer number (1222303070982).

Almost surely, 2^{111220100221100} is an apocalyptic number.

111220100221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111220100221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132008731666056).

111220100221100 is an abundant number, since it is smaller than the sum of its proper divisors (152797363111012).

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

111220100221100 is a wasteful number, since it uses less digits than its factorization.

111220100221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22117 (or 22097 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111220100221100 its reverse (1122001022111), we get a palindrome (112342101243211).

The spelling of 111220100221100 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred million, two hundred twenty-one thousand, one hundred".