42320443221 has 32 divisors (see below), whose sum is σ = 71667175680. Its totient is φ = 24178549248.

The previous prime is 42320443211. The next prime is 42320443271. The reversal of 42320443221 is 12234402324.

42320443221 is a `hidden beast` number, since 4 + 2 + 3 + 204 + 432 + 21 = 666.

It is not a de Polignac number, because 42320443221 - 2⁹ = 42320442709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42320443211) 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 31 ways as a sum of consecutive naturals, for example, 1157005 + ... + 1193021.

It is an arithmetic number, because the mean of its divisors is an integer number (2239599240).

Almost surely, 2^42320443221 is an apocalyptic number.

It is an amenable number.

42320443221 is a deficient number, since it is larger than the sum of its proper divisors (29346732459).

42320443221 is a wasteful number, since it uses less digits than its factorization.

42320443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42250 (or 42244 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 42320443221 its reverse (12234402324), we get a palindrome (54554845545).

The spelling of 42320443221 in words is "forty-two billion, three hundred twenty million, four hundred forty-three thousand, two hundred twenty-one".