12321214400 has 168 divisors, whose sum is σ = 33267335040. Its totient is φ = 4454272000.

The previous prime is 12321214357. The next prime is 12321214403. The reversal of 12321214400 is 441212321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321214403) 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 23 ways as a sum of consecutive naturals, for example, 3148445 + ... + 3152355.

Almost surely, 2^12321214400 is an apocalyptic number.

12321214400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321214400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16633667520).

12321214400 is an abundant number, since it is smaller than the sum of its proper divisors (20946120640).

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

12321214400 is a wasteful number, since it uses less digits than its factorization.

12321214400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123 (or 4108 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12321214400 its reverse (441212321), we get a palindrome (12762426721).

The spelling of 12321214400 in words is "twelve billion, three hundred twenty-one million, two hundred fourteen thousand, four hundred".