4042342010221 has 2 divisors, whose sum is σ = 4042342010222. Its totient is φ = 4042342010220.

The previous prime is 4042342010219. The next prime is 4042342010323. The reversal of 4042342010221 is 1220102432404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3476785368996 + 565556641225 = 1864614^2 + 752035^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042342010221 - 2¹ = 4042342010219 is a prime.

Together with 4042342010219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4042342010921) 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, 2021171005110 + 2021171005111.

It is an arithmetic number, because the mean of its divisors is an integer number (2021171005111).

Almost surely, 2^{4042342010221} is an apocalyptic number.

It is an amenable number.

4042342010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042342010221 is an equidigital number, since it uses as much as digits as its factorization.

4042342010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 4042342010221 its reverse (1220102432404), we get a palindrome (5262444442625).

The spelling of 4042342010221 in words is "four trillion, forty-two billion, three hundred forty-two million, ten thousand, two hundred twenty-one".