20303320110221 has 2 divisors, whose sum is σ = 20303320110222. Its totient is φ = 20303320110220.

The previous prime is 20303320110113. The next prime is 20303320110343. The reversal of 20303320110221 is 12201102330302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15564121729321 + 4739198380900 = 3945139^2 + 2176970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20303320110221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20303320110193 and 20303320110202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303320110421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151660055110 + 10151660055111.

It is an arithmetic number, because the mean of its divisors is an integer number (10151660055111).

Almost surely, 2^{20303320110221} is an apocalyptic number.

It is an amenable number.

20303320110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303320110221 is an equidigital number, since it uses as much as digits as its factorization.

20303320110221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20303320110221 its reverse (12201102330302), we get a palindrome (32504422440523).

The spelling of 20303320110221 in words is "twenty trillion, three hundred three billion, three hundred twenty million, one hundred ten thousand, two hundred twenty-one".