42320412221 has 4 divisors (see below), whose sum is σ = 44809848252. Its totient is φ = 39830976192.

The previous prime is 42320412217. The next prime is 42320412227. The reversal of 42320412221 is 12221402324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19553827225 + 22766584996 = 139835^2 + 150886^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320412221 - 2² = 42320412217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42320412227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244717990 + ... + 1244718023.

It is an arithmetic number, because the mean of its divisors is an integer number (11202462063).

Almost surely, 2^42320412221 is an apocalyptic number.

It is an amenable number.

42320412221 is a deficient number, since it is larger than the sum of its proper divisors (2489436031).

42320412221 is a wasteful number, since it uses less digits than its factorization.

42320412221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489436030.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42320412221 its reverse (12221402324), we get a palindrome (54541814545).

The spelling of 42320412221 in words is "forty-two billion, three hundred twenty million, four hundred twelve thousand, two hundred twenty-one".