20000121110201 has 2 divisors, whose sum is σ = 20000121110202. Its totient is φ = 20000121110200.

The previous prime is 20000121110149. The next prime is 20000121110209. The reversal of 20000121110201 is 10201112100002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15833117437225 + 4167003672976 = 3979085^2 + 2041324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000121110201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000121110209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000060555100 + 10000060555101.

It is an arithmetic number, because the mean of its divisors is an integer number (10000060555101).

Almost surely, 2^{20000121110201} is an apocalyptic number.

It is an amenable number.

20000121110201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000121110201 is an equidigital number, since it uses as much as digits as its factorization.

20000121110201 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 11.

Adding to 20000121110201 its reverse (10201112100002), we get a palindrome (30201233210203).

The spelling of 20000121110201 in words is "twenty trillion, one hundred twenty-one million, one hundred ten thousand, two hundred one".