221220200021112 has 192 divisors, whose sum is σ = 621597152716800. Its totient is φ = 71000394428160.

The previous prime is 221220200021057. The next prime is 221220200021131. The reversal of 221220200021112 is 211120002022122.

It is a happy number.

221220200021112 is a `hidden beast` number, since 2 + 21 + 220 + 200 + 0 + 211 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 739452663 + ... + 739751769.

It is an arithmetic number, because the mean of its divisors is an integer number (3237485170400).

Almost surely, 2^{221220200021112} 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 221220200021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310798576358400).

221220200021112 is an abundant number, since it is smaller than the sum of its proper divisors (400376952695688).

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

221220200021112 is a wasteful number, since it uses less digits than its factorization.

221220200021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300826 (or 300819 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221220200021112 its reverse (211120002022122), we get a palindrome (432340202043234).

The spelling of 221220200021112 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred million, twenty-one thousand, one hundred twelve".