1443320012221 has 4 divisors (see below), whose sum is σ = 1459537091100. Its totient is φ = 1427102933344.

The previous prime is 1443320012219. The next prime is 1443320012413. The reversal of 1443320012221 is 1222100233441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 224923496121 + 1218396516100 = 474261^2 + 1103810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1443320012221 - 2¹ = 1443320012219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443320010221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8108539306 + ... + 8108539483.

It is an arithmetic number, because the mean of its divisors is an integer number (364884272775).

Almost surely, 2^{1443320012221} is an apocalyptic number.

It is an amenable number.

1443320012221 is a deficient number, since it is larger than the sum of its proper divisors (16217078879).

1443320012221 is an equidigital number, since it uses as much as digits as its factorization.

1443320012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217078878.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1443320012221 its reverse (1222100233441), we get a palindrome (2665420245662).

The spelling of 1443320012221 in words is "one trillion, four hundred forty-three billion, three hundred twenty million, twelve thousand, two hundred twenty-one".