100221331320 has 256 divisors, whose sum is σ = 365301619200. Its totient is φ = 24238725120.

The previous prime is 100221331303. The next prime is 100221331351. The reversal of 100221331320 is 23133122001.

100221331320 is a `hidden beast` number, since 10 + 0 + 2 + 2 + 1 + 331 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 100221331293 and 100221331302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5134299 + ... + 5153781.

It is an arithmetic number, because the mean of its divisors is an integer number (1426959450).

Almost surely, 2^100221331320 is an apocalyptic number.

100221331320 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 100221331320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182650809600).

100221331320 is an abundant number, since it is smaller than the sum of its proper divisors (265080287880).

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

100221331320 is a wasteful number, since it uses less digits than its factorization.

100221331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19947 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 100221331320 its reverse (23133122001), we get a palindrome (123354453321).

The spelling of 100221331320 in words is "one hundred billion, two hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty".