123001323120 has 480 divisors, whose sum is σ = 461130485760. Its totient is φ = 30121528320.

The previous prime is 123001323079. The next prime is 123001323121. The reversal of 123001323120 is 21323100321.

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 = 123001323093 and 123001323102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123001323121) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 81403165 + ... + 81404675.

It is an arithmetic number, because the mean of its divisors is an integer number (960688512).

Almost surely, 2^123001323120 is an apocalyptic number.

123001323120 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 123001323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230565242880).

123001323120 is an abundant number, since it is smaller than the sum of its proper divisors (338129162640).

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

123001323120 is a wasteful number, since it uses less digits than its factorization.

123001323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 123001323120 its reverse (21323100321), we get a palindrome (144324423441).

The spelling of 123001323120 in words is "one hundred twenty-three billion, one million, three hundred twenty-three thousand, one hundred twenty".