221201121241201 has 2 divisors, whose sum is σ = 221201121241202. Its totient is φ = 221201121241200.

The previous prime is 221201121241189. The next prime is 221201121241211. The reversal of 221201121241201 is 102142121102122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151239205264225 + 69961915976976 = 12297935^2 + 8364324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221201121241201 is a prime.

It is not a weakly prime, because it can be changed into another prime (221201121241211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600560620600 + 110600560620601.

It is an arithmetic number, because the mean of its divisors is an integer number (110600560620601).

Almost surely, 2^{221201121241201} is an apocalyptic number.

It is an amenable number.

221201121241201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201121241201 is an equidigital number, since it uses as much as digits as its factorization.

221201121241201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221201121241201 its reverse (102142121102122), we get a palindrome (323343242343323).

The spelling of 221201121241201 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, two hundred forty-one thousand, two hundred one".