17121220220201 has 2 divisors, whose sum is σ = 17121220220202. Its totient is φ = 17121220220200.

The previous prime is 17121220220141. The next prime is 17121220220233. The reversal of 17121220220201 is 10202202212171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11432513440000 + 5688706780201 = 3381200^2 + 2385101^2 .

It is an emirp because it is prime and its reverse (10202202212171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17121220220201 - 2²² = 17121216025897 is a prime.

It is not a weakly prime, because it can be changed into another prime (17121220220261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8560610110100 + 8560610110101.

It is an arithmetic number, because the mean of its divisors is an integer number (8560610110101).

Almost surely, 2^{17121220220201} is an apocalyptic number.

It is an amenable number.

17121220220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

17121220220201 is an equidigital number, since it uses as much as digits as its factorization.

17121220220201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 17121220220201 its reverse (10202202212171), we get a palindrome (27323422432372).

The spelling of 17121220220201 in words is "seventeen trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, two hundred one".