221120202201020 has 96 divisors (see below), whose sum is σ = 485256625459200. Its totient is φ = 84543144491520.

The previous prime is 221120202201007. The next prime is 221120202201043. The reversal of 221120202201020 is 20102202021122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221120202201020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10362227 + ... + 23443893.

It is an arithmetic number, because the mean of its divisors is an integer number (5054756515200).

Almost surely, 2^{221120202201020} is an apocalyptic number.

221120202201020 is a gapful number since it is divisible by the number (20) 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 221120202201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242628312729600).

221120202201020 is an abundant number, since it is smaller than the sum of its proper divisors (264136423258180).

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

221120202201020 is a wasteful number, since it uses less digits than its factorization.

221120202201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13082043 (or 13082041 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221120202201020 its reverse (20102202021122), we get a palindrome (241222404222142).

The spelling of 221120202201020 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred two million, two hundred one thousand, twenty".