144221211217 has 2 divisors, whose sum is σ = 144221211218. Its totient is φ = 144221211216.

The previous prime is 144221211191. The next prime is 144221211221. The reversal of 144221211217 is 712112122441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93829491856 + 50391719361 = 306316^2 + 224481^2 .

It is a cyclic number.

It is not a de Polignac number, because 144221211217 - 2¹¹ = 144221209169 is a prime.

It is not a weakly prime, because it can be changed into another prime (144221211517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72110605608 + 72110605609.

It is an arithmetic number, because the mean of its divisors is an integer number (72110605609).

Almost surely, 2^144221211217 is an apocalyptic number.

It is an amenable number.

144221211217 is a deficient number, since it is larger than the sum of its proper divisors (1).

144221211217 is an equidigital number, since it uses as much as digits as its factorization.

144221211217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 28.

Adding to 144221211217 its reverse (712112122441), we get a palindrome (856333333658).

The spelling of 144221211217 in words is "one hundred forty-four billion, two hundred twenty-one million, two hundred eleven thousand, two hundred seventeen".