42345330221 has 2 divisors, whose sum is σ = 42345330222. Its totient is φ = 42345330220.

The previous prime is 42345330217. The next prime is 42345330257. The reversal of 42345330221 is 12203354324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27182116900 + 15163213321 = 164870^2 + 123139^2 .

It is a cyclic number.

It is not a de Polignac number, because 42345330221 - 2² = 42345330217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42345330421) 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 as a sum of consecutive naturals, namely, 21172665110 + 21172665111.

It is an arithmetic number, because the mean of its divisors is an integer number (21172665111).

Almost surely, 2^42345330221 is an apocalyptic number.

It is an amenable number.

42345330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42345330221 is an equidigital number, since it uses as much as digits as its factorization.

42345330221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 42345330221 its reverse (12203354324), we get a palindrome (54548684545).

The spelling of 42345330221 in words is "forty-two billion, three hundred forty-five million, three hundred thirty thousand, two hundred twenty-one".