12021201321 has 24 divisors (see below), whose sum is σ = 17189532864. Its totient is φ = 7458454080.

The previous prime is 12021201319. The next prime is 12021201331. The reversal of 12021201321 is 12310212021.

12021201321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12021201321 - 2¹ = 12021201319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021201321.

It is not an unprimeable number, because it can be changed into a prime (12021201301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30831 + ... + 158091.

It is an arithmetic number, because the mean of its divisors is an integer number (716230536).

Almost surely, 2^12021201321 is an apocalyptic number.

It is an amenable number.

12021201321 is a deficient number, since it is larger than the sum of its proper divisors (5168331543).

12021201321 is a wasteful number, since it uses less digits than its factorization.

12021201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127361 (or 127324 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021201321 its reverse (12310212021), we get a palindrome (24331413342).

The spelling of 12021201321 in words is "twelve billion, twenty-one million, two hundred one thousand, three hundred twenty-one".