123320131320 has 256 divisors, whose sum is σ = 391184640000. Its totient is φ = 31038898176.

The previous prime is 123320131289. The next prime is 123320131327. The reversal of 123320131320 is 23131023321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320131327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 160363896 + ... + 160364664.

It is an arithmetic number, because the mean of its divisors is an integer number (1528065000).

Almost surely, 2^123320131320 is an apocalyptic number.

123320131320 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 123320131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195592320000).

123320131320 is an abundant number, since it is smaller than the sum of its proper divisors (267864508680).

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

123320131320 is a wasteful number, since it uses less digits than its factorization.

123320131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502 (or 1498 counting only the distinct ones).

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

Adding to 123320131320 its reverse (23131023321), we get a palindrome (146451154641).

The spelling of 123320131320 in words is "one hundred twenty-three billion, three hundred twenty million, one hundred thirty-one thousand, three hundred twenty".