123113030100 has 144 divisors (see below), whose sum is σ = 368847433920. Its totient is φ = 31667328000.

The previous prime is 123113030087. The next prime is 123113030101. The reversal of 123113030100 is 1030311321.

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 123113030100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123113030101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9763800 + ... + 9776400.

Almost surely, 2^123113030100 is an apocalyptic number.

123113030100 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 123113030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184423716960).

123113030100 is an abundant number, since it is smaller than the sum of its proper divisors (245734403820).

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

123113030100 is a wasteful number, since it uses less digits than its factorization.

123113030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770 (or 13763 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 123113030100 its reverse (1030311321), we get a palindrome (124143341421).

The spelling of 123113030100 in words is "one hundred twenty-three billion, one hundred thirteen million, thirty thousand, one hundred".