42203430221 has 2 divisors, whose sum is σ = 42203430222. Its totient is φ = 42203430220.

The previous prime is 42203430193. The next prime is 42203430251. The reversal of 42203430221 is 12203430224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41881622500 + 321807721 = 204650^2 + 17939^2 .

It is a cyclic number.

It is not a de Polignac number, because 42203430221 - 2¹⁰ = 42203429197 is a prime.

It is a super-2 number, since 2×42203430221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42203430251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101715110 + 21101715111.

It is an arithmetic number, because the mean of its divisors is an integer number (21101715111).

Almost surely, 2^42203430221 is an apocalyptic number.

It is an amenable number.

42203430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42203430221 is an equidigital number, since it uses as much as digits as its factorization.

42203430221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 42203430221 its reverse (12203430224), we get a palindrome (54406860445).

The spelling of 42203430221 in words is "forty-two billion, two hundred three million, four hundred thirty thousand, two hundred twenty-one".