201442444321 has 4 divisors (see below), whose sum is σ = 201474119044. Its totient is φ = 201410769600.

The previous prime is 201442444297. The next prime is 201442444327. The reversal of 201442444321 is 123444244102.

It is a happy number.

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 29433176721 + 172009267600 = 171561^2 + 414740^2 .

It is a cyclic number.

It is not a de Polignac number, because 201442444321 - 2²⁵ = 201408889889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201442444327) 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, 15827820 + ... + 15840541.

It is an arithmetic number, because the mean of its divisors is an integer number (50368529761).

Almost surely, 2^201442444321 is an apocalyptic number.

It is an amenable number.

201442444321 is a deficient number, since it is larger than the sum of its proper divisors (31674723).

201442444321 is an equidigital number, since it uses as much as digits as its factorization.

201442444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31674722.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 201442444321 its reverse (123444244102), we get a palindrome (324886688423).

The spelling of 201442444321 in words is "two hundred one billion, four hundred forty-two million, four hundred forty-four thousand, three hundred twenty-one".