123113320320 has 128 divisors (see below), whose sum is σ = 397799828640. Its totient is φ = 32380452864.

The previous prime is 123113320301. The next prime is 123113320367. The reversal of 123113320320 is 23023311321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299029 + ... + 579348.

Almost surely, 2^123113320320 is an apocalyptic number.

123113320320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123113320320 is an abundant number, since it is smaller than the sum of its proper divisors (274686508320).

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

123113320320 is an equidigital number, since it uses as much as digits as its factorization.

123113320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878472 (or 878460 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123113320320 its reverse (23023311321), we get a palindrome (146136631641).

The spelling of 123113320320 in words is "one hundred twenty-three billion, one hundred thirteen million, three hundred twenty thousand, three hundred twenty".