221113201020 has 96 divisors (see below), whose sum is σ = 636553645056. Its totient is φ = 57306412800.

The previous prime is 221113201009. The next prime is 221113201033. The reversal of 221113201020 is 20102311122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1967755 + ... + 2077085.

It is an arithmetic number, because the mean of its divisors is an integer number (6630767136).

Almost surely, 2^221113201020 is an apocalyptic number.

221113201020 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 221113201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318276822528).

221113201020 is an abundant number, since it is smaller than the sum of its proper divisors (415440444036).

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

221113201020 is a wasteful number, since it uses less digits than its factorization.

221113201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110291 (or 110289 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221113201020 its reverse (20102311122), we get a palindrome (241215512142).

The spelling of 221113201020 in words is "two hundred twenty-one billion, one hundred thirteen million, two hundred one thousand, twenty".