123012231320 has 64 divisors (see below), whose sum is σ = 312350839200. Its totient is φ = 43189242880.

The previous prime is 123012231317. The next prime is 123012231343. The reversal of 123012231320 is 23132210321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123012231292 and 123012231301.

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, 4807469 + ... + 4832988.

Almost surely, 2^123012231320 is an apocalyptic number.

123012231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012231320 is an abundant number, since it is smaller than the sum of its proper divisors (189338607880).

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

123012231320 is a wasteful number, since it uses less digits than its factorization.

123012231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9640508 (or 9640504 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123012231320 its reverse (23132210321), we get a palindrome (146144441641).

The spelling of 123012231320 in words is "one hundred twenty-three billion, twelve million, two hundred thirty-one thousand, three hundred twenty".