12121232331320 has 64 divisors (see below), whose sum is σ = 31170496965120. Its totient is φ = 4155635908224.

The previous prime is 12121232331293. The next prime is 12121232331359. The reversal of 12121232331320 is 2313323212121.

It is a self number, because there is not a number n which added to its sum of digits gives 12121232331320.

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, 4344269 + ... + 6566211.

It is an arithmetic number, because the mean of its divisors is an integer number (487039015080).

Almost surely, 2^{12121232331320} is an apocalyptic number.

12121232331320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121232331320 is an abundant number, since it is smaller than the sum of its proper divisors (19049264633800).

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

12121232331320 is a wasteful number, since it uses less digits than its factorization.

12121232331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241444 (or 2241440 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 12121232331320 its reverse (2313323212121), we get a palindrome (14434555543441).

The spelling of 12121232331320 in words is "twelve trillion, one hundred twenty-one billion, two hundred thirty-two million, three hundred thirty-one thousand, three hundred twenty".