211222221220201 has 2 divisors, whose sum is σ = 211222221220202. Its totient is φ = 211222221220200.

The previous prime is 211222221220193. The next prime is 211222221220223. The reversal of 211222221220201 is 102022122222112.

It is an a-pointer prime, because the next prime (211222221220223) can be obtained adding 211222221220201 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204927842720601 + 6294378499600 = 14315301^2 + 2508860^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222221220201 - 2³ = 211222221220193 is a prime.

It is a super-2 number, since 2×211222221220201² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222221220271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611110610100 + 105611110610101.

It is an arithmetic number, because the mean of its divisors is an integer number (105611110610101).

Almost surely, 2^{211222221220201} is an apocalyptic number.

It is an amenable number.

211222221220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222221220201 is an equidigital number, since it uses as much as digits as its factorization.

211222221220201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211222221220201 its reverse (102022122222112), we get a palindrome (313244343442313).

The spelling of 211222221220201 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, two hundred one".