20042224530221 has 2 divisors, whose sum is σ = 20042224530222. Its totient is φ = 20042224530220.

The previous prime is 20042224530203. The next prime is 20042224530311. The reversal of 20042224530221 is 12203542224002.

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., 18954137713225 + 1088086816996 = 4353635^2 + 1043114^2 .

It is a cyclic number.

It is not a de Polignac number, because 20042224530221 - 2⁶ = 20042224530157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20042224520221) 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, 10021112265110 + 10021112265111.

It is an arithmetic number, because the mean of its divisors is an integer number (10021112265111).

Almost surely, 2^{20042224530221} is an apocalyptic number.

It is an amenable number.

20042224530221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042224530221 is an equidigital number, since it uses as much as digits as its factorization.

20042224530221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 20042224530221 its reverse (12203542224002), we get a palindrome (32245766754223).

The spelling of 20042224530221 in words is "twenty trillion, forty-two billion, two hundred twenty-four million, five hundred thirty thousand, two hundred twenty-one".