20000010221 has 2 divisors, whose sum is σ = 20000010222. Its totient is φ = 20000010220.

The previous prime is 20000010193. The next prime is 20000010253. The reversal of 20000010221 is 12201000002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17732917225 + 2267092996 = 133165^2 + 47614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000010221 - 2¹⁸ = 19999748077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000010199 and 20000010208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000016221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000005110 + 10000005111.

It is an arithmetic number, because the mean of its divisors is an integer number (10000005111).

Almost surely, 2^20000010221 is an apocalyptic number.

It is an amenable number.

20000010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000010221 is an equidigital number, since it uses as much as digits as its factorization.

20000010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20000010221 its reverse (12201000002), we get a palindrome (32201010223).

The spelling of 20000010221 in words is "twenty billion, ten thousand, two hundred twenty-one".