123031000100 has 72 divisors (see below), whose sum is σ = 273622987008. Its totient is φ = 47988563200.

The previous prime is 123031000063. The next prime is 123031000133. The reversal of 123031000100 is 1000130321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10026569 + ... + 10038831.

It is an arithmetic number, because the mean of its divisors is an integer number (3800319264).

Almost surely, 2^123031000100 is an apocalyptic number.

123031000100 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 123031000100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136811493504).

123031000100 is an abundant number, since it is smaller than the sum of its proper divisors (150591986908).

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

123031000100 is a wasteful number, since it uses less digits than its factorization.

123031000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14765 (or 14758 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 123031000100 its reverse (1000130321), we get a palindrome (124031130421).

The spelling of 123031000100 in words is "one hundred twenty-three billion, thirty-one million, one hundred", and thus it is an aban number.