100100323220 has 24 divisors (see below), whose sum is σ = 210247485000. Its totient is φ = 40033118592.

The previous prime is 100100323187. The next prime is 100100323223. The reversal of 100100323220 is 22323001001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13521968656 + 86578354564 = 116284^2 + 294242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100100323195 and 100100323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100323223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320315 + ... + 550274.

It is an arithmetic number, because the mean of its divisors is an integer number (8760311875).

Almost surely, 2^100100323220 is an apocalyptic number.

100100323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100100323220 is an abundant number, since it is smaller than the sum of its proper divisors (110147161780).

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

100100323220 is a wasteful number, since it uses less digits than its factorization.

100100323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876347 (or 876345 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 100100323220 its reverse (22323001001), we get a palindrome (122423324221).

The spelling of 100100323220 in words is "one hundred billion, one hundred million, three hundred twenty-three thousand, two hundred twenty".