12012134400 has 1008 divisors, whose sum is σ = 52818792000. Its totient is φ = 2601123840.

The previous prime is 12012134383. The next prime is 12012134401. The reversal of 12012134400 is 443121021.

12012134400 is a `hidden beast` number, since 1 + 201 + 21 + 3 + 440 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12012134401) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 632217591 + ... + 632217609.

Almost surely, 2^12012134400 is an apocalyptic number.

12012134400 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 12012134400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26409396000).

12012134400 is an abundant number, since it is smaller than the sum of its proper divisors (40806657600).

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

12012134400 is an equidigital number, since it uses as much as digits as its factorization.

12012134400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12012134400 its reverse (443121021), we get a palindrome (12455255421).

The spelling of 12012134400 in words is "twelve billion, twelve million, one hundred thirty-four thousand, four hundred".