123113231320 has 32 divisors (see below), whose sum is σ = 277031764800. Its totient is φ = 49240493568.

The previous prime is 123113231317. The next prime is 123113231327. The reversal of 123113231320 is 23132311321.

It is a junction number, because it is equal to n+sod(n) for n = 123113231291 and 123113231300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123113231327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280912 + ... + 570208.

It is an arithmetic number, because the mean of its divisors is an integer number (8657242650).

Almost surely, 2^123113231320 is an apocalyptic number.

123113231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123113231320 is an abundant number, since it is smaller than the sum of its proper divisors (153918533480).

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

123113231320 is a wasteful number, since it uses less digits than its factorization.

123113231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299947 (or 299943 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123113231320 its reverse (23132311321), we get a palindrome (146245542641).

The spelling of 123113231320 in words is "one hundred twenty-three billion, one hundred thirteen million, two hundred thirty-one thousand, three hundred twenty".