144144521321 has 4 divisors (see below), whose sum is σ = 145630547412. Its totient is φ = 142658495232.

The previous prime is 144144521303. The next prime is 144144521333. The reversal of 144144521321 is 123125441441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123125441441 = 337 ⋅365357393.

It can be written as a sum of positive squares in 2 ways, for example, as 30831496921 + 113313024400 = 175589^2 + 336620^2 .

It is a cyclic number.

It is not a de Polignac number, because 144144521321 - 2¹⁰ = 144144520297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144144526321) 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, 743012900 + ... + 743013093.

It is an arithmetic number, because the mean of its divisors is an integer number (36407636853).

Almost surely, 2^144144521321 is an apocalyptic number.

It is an amenable number.

144144521321 is a deficient number, since it is larger than the sum of its proper divisors (1486026091).

144144521321 is an equidigital number, since it uses as much as digits as its factorization.

144144521321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486026090.

The product of its digits is 15360, while the sum is 32.

Adding to 144144521321 its reverse (123125441441), we get a palindrome (267269962762).

The spelling of 144144521321 in words is "one hundred forty-four billion, one hundred forty-four million, five hundred twenty-one thousand, three hundred twenty-one".