12020421444400 has 60 divisors (see below), whose sum is σ = 28890520343464. Its totient is φ = 4806260928000.

The previous prime is 12020421444397. The next prime is 12020421444401. The reversal of 12020421444400 is 444412402021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12020421444401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4951746 + ... + 6968545.

Almost surely, 2^{12020421444400} is an apocalyptic number.

12020421444400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020421444400 is an abundant number, since it is smaller than the sum of its proper divisors (16870098899064).

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

12020421444400 is a wasteful number, since it uses less digits than its factorization.

12020421444400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11922830 (or 11922819 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 12020421444400 its reverse (444412402021), we get a palindrome (12464833846421).

The spelling of 12020421444400 in words is "twelve trillion, twenty billion, four hundred twenty-one million, four hundred forty-four thousand, four hundred".