123121333212 has 24 divisors (see below), whose sum is σ = 299773681536. Its totient is φ = 39256077168.

The previous prime is 123121333199. The next prime is 123121333243. The reversal of 123121333212 is 212333121321.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223045618 + ... + 223046169.

It is an arithmetic number, because the mean of its divisors is an integer number (12490570064).

Almost surely, 2^123121333212 is an apocalyptic number.

123121333212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123121333212 is an abundant number, since it is smaller than the sum of its proper divisors (176652348324).

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

123121333212 is a wasteful number, since it uses less digits than its factorization.

123121333212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446091817 (or 446091815 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 123121333212 its reverse (212333121321), we get a palindrome (335454454533).

The spelling of 123121333212 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred thirty-three thousand, two hundred twelve".