20110110200221 has 2 divisors, whose sum is σ = 20110110200222. Its totient is φ = 20110110200220.

The previous prime is 20110110200203. The next prime is 20110110200251. The reversal of 20110110200221 is 12200201101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11171570912100 + 8938539288121 = 3342390^2 + 2989739^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110110200221 - 2¹¹ = 20110110198173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110110200251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055055100110 + 10055055100111.

It is an arithmetic number, because the mean of its divisors is an integer number (10055055100111).

Almost surely, 2^{20110110200221} is an apocalyptic number.

It is an amenable number.

20110110200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110110200221 is an equidigital number, since it uses as much as digits as its factorization.

20110110200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20110110200221 its reverse (12200201101102), we get a palindrome (32310311301323).

The spelling of 20110110200221 in words is "twenty trillion, one hundred ten billion, one hundred ten million, two hundred thousand, two hundred twenty-one".