12021420163552 has 96 divisors (see below), whose sum is σ = 24513908428800. Its totient is φ = 5800303062528.

The previous prime is 12021420163483. The next prime is 12021420163567. The reversal of 12021420163552 is 25536102412021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25570353 + ... + 26036239.

It is an arithmetic number, because the mean of its divisors is an integer number (255353212800).

Almost surely, 2^{12021420163552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021420163552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12256954214400).

12021420163552 is an abundant number, since it is smaller than the sum of its proper divisors (12492488265248).

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

12021420163552 is a wasteful number, since it uses less digits than its factorization.

12021420163552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466208 (or 466200 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 12021420163552 its reverse (25536102412021), we get a palindrome (37557522575573).

The spelling of 12021420163552 in words is "twelve trillion, twenty-one billion, four hundred twenty million, one hundred sixty-three thousand, five hundred fifty-two".