221200021122112 has 112 divisors (see below), whose sum is σ = 464468650822080. Its totient is φ = 104230361088000.

The previous prime is 221200021122107. The next prime is 221200021122167. The reversal of 221200021122112 is 211221120002122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 221200021122112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331180812 + ... + 331848052.

Almost surely, 2^{221200021122112} 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 221200021122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232234325411040).

221200021122112 is an abundant number, since it is smaller than the sum of its proper divisors (243268629699968).

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

221200021122112 is a wasteful number, since it uses less digits than its factorization.

221200021122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668700 (or 668690 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221200021122112 its reverse (211221120002122), we get a palindrome (432421141124234).

The spelling of 221200021122112 in words is "two hundred twenty-one trillion, two hundred billion, twenty-one million, one hundred twenty-two thousand, one hundred twelve".