123123223200 has 144 divisors (see below), whose sum is σ = 400979648160. Its totient is φ = 32815365120.

The previous prime is 123123223189. The next prime is 123123223213. The reversal of 123123223200 is 2322321321.

It is a happy number.

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, 4852146 + ... + 4877454.

It is an arithmetic number, because the mean of its divisors is an integer number (2784580890).

Almost surely, 2^123123223200 is an apocalyptic number.

123123223200 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 123123223200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200489824080).

123123223200 is an abundant number, since it is smaller than the sum of its proper divisors (277856424960).

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

123123223200 is a wasteful number, since it uses less digits than its factorization.

123123223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27359 (or 27346 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 123123223200 its reverse (2322321321), we get a palindrome (125445544521).

The spelling of 123123223200 in words is "one hundred twenty-three billion, one hundred twenty-three million, two hundred twenty-three thousand, two hundred".