2020208454221 has 2 divisors, whose sum is σ = 2020208454222. Its totient is φ = 2020208454220.

The previous prime is 2020208454161. The next prime is 2020208454223. The reversal of 2020208454221 is 1224548020202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1974758478121 + 45449976100 = 1405261^2 + 213190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020208454221 - 2¹⁸ = 2020208192077 is a prime.

Together with 2020208454223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020208454223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010104227110 + 1010104227111.

It is an arithmetic number, because the mean of its divisors is an integer number (1010104227111).

Almost surely, 2^{2020208454221} is an apocalyptic number.

It is an amenable number.

2020208454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020208454221 is an equidigital number, since it uses as much as digits as its factorization.

2020208454221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 32.

The spelling of 2020208454221 in words is "two trillion, twenty billion, two hundred eight million, four hundred fifty-four thousand, two hundred twenty-one".