123312103212 has 48 divisors (see below), whose sum is σ = 290751880160. Its totient is φ = 40672253952.

The previous prime is 123312103169. The next prime is 123312103217. The reversal of 123312103212 is 212301213321.

It is not an unprimeable number, because it can be changed into a prime (123312103217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10038018 + ... + 10050294.

Almost surely, 2^123312103212 is an apocalyptic number.

123312103212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123312103212 is an abundant number, since it is smaller than the sum of its proper divisors (167439776948).

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

123312103212 is a wasteful number, since it uses less digits than its factorization.

123312103212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21010 (or 21008 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123312103212 its reverse (212301213321), we get a palindrome (335613316533).

The spelling of 123312103212 in words is "one hundred twenty-three billion, three hundred twelve million, one hundred three thousand, two hundred twelve".