100321221000 has 768 divisors, whose sum is σ = 423577889280. Its totient is φ = 19236096000.

The previous prime is 100321220999. The next prime is 100321221043. The reversal of 100321221000 is 122123001.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 191 ways as a sum of consecutive naturals, for example, 33031482 + ... + 33034518.

It is an arithmetic number, because the mean of its divisors is an integer number (551533710).

Almost surely, 2^100321221000 is an apocalyptic number.

100321221000 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 100321221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211788944640).

100321221000 is an abundant number, since it is smaller than the sum of its proper divisors (323256668280).

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

100321221000 is a wasteful number, since it uses less digits than its factorization.

100321221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 100321221000 its reverse (122123001), we get a palindrome (100443344001).

The spelling of 100321221000 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand".