20302200221 has 2 divisors, whose sum is σ = 20302200222. Its totient is φ = 20302200220.

The previous prime is 20302200161. The next prime is 20302200313. The reversal of 20302200221 is 12200220302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11468268100 + 8833932121 = 107090^2 + 93989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302200221 - 2³⁰ = 19228458397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20302200196 and 20302200205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302208221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151100110 + 10151100111.

It is an arithmetic number, because the mean of its divisors is an integer number (10151100111).

Almost surely, 2^20302200221 is an apocalyptic number.

It is an amenable number.

20302200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302200221 is an equidigital number, since it uses as much as digits as its factorization.

20302200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20302200221 its reverse (12200220302), we get a palindrome (32502420523).

The spelling of 20302200221 in words is "twenty billion, three hundred two million, two hundred thousand, two hundred twenty-one".