201121221212201 has 2 divisors, whose sum is σ = 201121221212202. Its totient is φ = 201121221212200.

The previous prime is 201121221212189. The next prime is 201121221212209. The reversal of 201121221212201 is 102212122121102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199665943302400 + 1455277909801 = 14130320^2 + 1206349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121221212201 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121221212209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560610606100 + 100560610606101.

It is an arithmetic number, because the mean of its divisors is an integer number (100560610606101).

Almost surely, 2^{201121221212201} is an apocalyptic number.

It is an amenable number.

201121221212201 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121221212201 is an equidigital number, since it uses as much as digits as its factorization.

201121221212201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201121221212201 its reverse (102212122121102), we get a palindrome (303333343333303).

The spelling of 201121221212201 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred one".