20103110221 has 2 divisors, whose sum is σ = 20103110222. Its totient is φ = 20103110220.

The previous prime is 20103110191. The next prime is 20103110263. The reversal of 20103110221 is 12201130102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12879980100 + 7223130121 = 113490^2 + 84989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103110221 - 2¹⁹ = 20102585933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20103110821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051555110 + 10051555111.

It is an arithmetic number, because the mean of its divisors is an integer number (10051555111).

Almost surely, 2^20103110221 is an apocalyptic number.

It is an amenable number.

20103110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103110221 is an equidigital number, since it uses as much as digits as its factorization.

20103110221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20103110221 its reverse (12201130102), we get a palindrome (32304240323).

The spelling of 20103110221 in words is "twenty billion, one hundred three million, one hundred ten thousand, two hundred twenty-one".