12123211312320 has 224 divisors, whose sum is σ = 41072080903680. Its totient is φ = 3020750807040.

The previous prime is 12123211312309. The next prime is 12123211312327. The reversal of 12123211312320 is 2321311232121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (12123211312327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3220876 + ... + 5883915.

Almost surely, 2^{12123211312320} is an apocalyptic number.

12123211312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123211312320 is an abundant number, since it is smaller than the sum of its proper divisors (28948869591360).

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

12123211312320 is a wasteful number, since it uses less digits than its factorization.

12123211312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9104903 (or 9104893 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12123211312320 its reverse (2321311232121), we get a palindrome (14444522544441).

The spelling of 12123211312320 in words is "twelve trillion, one hundred twenty-three billion, two hundred eleven million, three hundred twelve thousand, three hundred twenty".