123320001012 has 72 divisors (see below), whose sum is σ = 322328089440. Its totient is φ = 36636163200.

The previous prime is 123320000981. The next prime is 123320001029. The reversal of 123320001012 is 210100023321.

It is a junction number, because it is equal to n+sod(n) for n = 123320000982 and 123320001000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 989614 + ... + 1107237.

It is an arithmetic number, because the mean of its divisors is an integer number (4476779020).

Almost surely, 2^123320001012 is an apocalyptic number.

123320001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123320001012 is an abundant number, since it is smaller than the sum of its proper divisors (199008088428).

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

123320001012 is a wasteful number, since it uses less digits than its factorization.

123320001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096913 (or 2096898 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 123320001012 its reverse (210100023321), we get a palindrome (333420024333).

The spelling of 123320001012 in words is "one hundred twenty-three billion, three hundred twenty million, one thousand, twelve".