144221221321 has 2 divisors, whose sum is σ = 144221221322. Its totient is φ = 144221221320.

The previous prime is 144221221273. The next prime is 144221221351. The reversal of 144221221321 is 123122122441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144220695696 + 525625 = 379764^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144221221321 is a prime.

It is a super-3 number, since 3×144221221321³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (144221221351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72110610660 + 72110610661.

It is an arithmetic number, because the mean of its divisors is an integer number (72110610661).

Almost surely, 2^144221221321 is an apocalyptic number.

It is an amenable number.

144221221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144221221321 is an equidigital number, since it uses as much as digits as its factorization.

144221221321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

Adding to 144221221321 its reverse (123122122441), we get a palindrome (267343343762).

The spelling of 144221221321 in words is "one hundred forty-four billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-one".