123220321212 has 24 divisors (see below), whose sum is σ = 287777163856. Its totient is φ = 41035857408.

The previous prime is 123220321207. The next prime is 123220321229. The reversal of 123220321212 is 212123022321.

123220321212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4684213 + ... + 4710444.

Almost surely, 2^123220321212 is an apocalyptic number.

123220321212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123220321212 is an abundant number, since it is smaller than the sum of its proper divisors (164556842644).

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

123220321212 is a wasteful number, since it uses less digits than its factorization.

123220321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395757 (or 9395755 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123220321212 its reverse (212123022321), we get a palindrome (335343343533).

The spelling of 123220321212 in words is "one hundred twenty-three billion, two hundred twenty million, three hundred twenty-one thousand, two hundred twelve".