42323412421 has 2 divisors, whose sum is σ = 42323412422. Its totient is φ = 42323412420.

The previous prime is 42323412367. The next prime is 42323412427. The reversal of 42323412421 is 12421432324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26342913025 + 15980499396 = 162305^2 + 126414^2 .

It is a cyclic number.

It is not a de Polignac number, because 42323412421 - 2⁹ = 42323411909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42323412421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42323412427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21161706210 + 21161706211.

It is an arithmetic number, because the mean of its divisors is an integer number (21161706211).

Almost surely, 2^42323412421 is an apocalyptic number.

It is an amenable number.

42323412421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42323412421 is an equidigital number, since it uses as much as digits as its factorization.

42323412421 is an odious number, because the sum of its binary digits is odd.

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

Adding to 42323412421 its reverse (12421432324), we get a palindrome (54744844745).

The spelling of 42323412421 in words is "forty-two billion, three hundred twenty-three million, four hundred twelve thousand, four hundred twenty-one".