100321223220 has 144 divisors (see below), whose sum is σ = 332188059840. Its totient is φ = 25344285696.

The previous prime is 100321223209. The next prime is 100321223227. The reversal of 100321223220 is 22322123001.

100321223220 is a `hidden beast` number, since 1 + 0 + 0 + 321 + 22 + 322 + 0 = 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 = 100321223193 and 100321223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321223227) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 450877 + ... + 635556.

Almost surely, 2^100321223220 is an apocalyptic number.

100321223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100321223220 is an abundant number, since it is smaller than the sum of its proper divisors (231866836620).

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

100321223220 is a wasteful number, since it uses less digits than its factorization.

100321223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086476 (or 1086462 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 100321223220 its reverse (22322123001), we get a palindrome (122643346221).

The spelling of 100321223220 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty".