4145422020221 has 2 divisors, whose sum is σ = 4145422020222. Its totient is φ = 4145422020220.

The previous prime is 4145422020209. The next prime is 4145422020269. The reversal of 4145422020221 is 1220202245414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2225285244121 + 1920136776100 = 1491739^2 + 1385690^2 .

It is a cyclic number.

It is not a de Polignac number, because 4145422020221 - 2³⁸ = 3870544113277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4145422020281) 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, 2072711010110 + 2072711010111.

It is an arithmetic number, because the mean of its divisors is an integer number (2072711010111).

Almost surely, 2^{4145422020221} is an apocalyptic number.

It is an amenable number.

4145422020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4145422020221 is an equidigital number, since it uses as much as digits as its factorization.

4145422020221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 4145422020221 its reverse (1220202245414), we get a palindrome (5365624265635).

The spelling of 4145422020221 in words is "four trillion, one hundred forty-five billion, four hundred twenty-two million, twenty thousand, two hundred twenty-one".