42322144321 has 2 divisors, whose sum is σ = 42322144322. Its totient is φ = 42322144320.

The previous prime is 42322144309. The next prime is 42322144349. The reversal of 42322144321 is 12344122324.

It is an a-pointer prime, because the next prime (42322144349) can be obtained adding 42322144321 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26968208400 + 15353935921 = 164220^2 + 123911^2 .

It is a cyclic number.

It is not a de Polignac number, because 42322144321 - 2¹¹ = 42322142273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42322144321.

It is not a weakly prime, because it can be changed into another prime (42322144421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21161072160 + 21161072161.

It is an arithmetic number, because the mean of its divisors is an integer number (21161072161).

Almost surely, 2^42322144321 is an apocalyptic number.

It is an amenable number.

42322144321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42322144321 is an equidigital number, since it uses as much as digits as its factorization.

42322144321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

Adding to 42322144321 its reverse (12344122324), we get a palindrome (54666266645).

The spelling of 42322144321 in words is "forty-two billion, three hundred twenty-two million, one hundred forty-four thousand, three hundred twenty-one".