123305310120 has 128 divisors (see below), whose sum is σ = 388817936640. Its totient is φ = 31222118400.

The previous prime is 123305310103. The next prime is 123305310157. The reversal of 123305310120 is 21013503321.

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, 215070 + ... + 541170.

It is an arithmetic number, because the mean of its divisors is an integer number (3037640130).

Almost surely, 2^123305310120 is an apocalyptic number.

123305310120 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 123305310120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194408968320).

123305310120 is an abundant number, since it is smaller than the sum of its proper divisors (265512626520).

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

123305310120 is a wasteful number, since it uses less digits than its factorization.

123305310120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326275 (or 326271 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 123305310120 its reverse (21013503321), we get a palindrome (144318813441).

The spelling of 123305310120 in words is "one hundred twenty-three billion, three hundred five million, three hundred ten thousand, one hundred twenty".