211221122102201 has 2 divisors, whose sum is σ = 211221122102202. Its totient is φ = 211221122102200.

The previous prime is 211221122102197. The next prime is 211221122102227. The reversal of 211221122102201 is 102201221122112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139214017612201 + 72007104490000 = 11798899^2 + 8485700^2 .

It is a cyclic number.

It is not a de Polignac number, because 211221122102201 - 2² = 211221122102197 is a prime.

It is a super-2 number, since 2×211221122102201² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211221122102281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610561051100 + 105610561051101.

It is an arithmetic number, because the mean of its divisors is an integer number (105610561051101).

Almost surely, 2^{211221122102201} is an apocalyptic number.

It is an amenable number.

211221122102201 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221122102201 is an equidigital number, since it uses as much as digits as its factorization.

211221122102201 is an evil number, because the sum of its binary digits is even.

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

Adding to 211221122102201 its reverse (102201221122112), we get a palindrome (313422343224313).

The spelling of 211221122102201 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred two thousand, two hundred one".