100123320120 has 128 divisors (see below), whose sum is σ = 320751360000. Its totient is φ = 24947274240.

The previous prime is 100123320109. The next prime is 100123320131. The reversal of 100123320120 is 21023321001.

It is an interprime number because it is at equal distance from previous prime (100123320109) and next prime (100123320131).

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

It is a self number, because there is not a number n which added to its sum of digits gives 100123320120.

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, 356170 + ... + 571929.

It is an arithmetic number, because the mean of its divisors is an integer number (2505870000).

Almost surely, 2^100123320120 is an apocalyptic number.

100123320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100123320120 is an abundant number, since it is smaller than the sum of its proper divisors (220628039880).

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

100123320120 is a wasteful number, since it uses less digits than its factorization.

100123320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928173 (or 928169 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 100123320120 its reverse (21023321001), we get a palindrome (121146641121).

The spelling of 100123320120 in words is "one hundred billion, one hundred twenty-three million, three hundred twenty thousand, one hundred twenty".