221210221222201 has 2 divisors, whose sum is σ = 221210221222202. Its totient is φ = 221210221222200.

The previous prime is 221210221222129. The next prime is 221210221222219. The reversal of 221210221222201 is 102222122012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206497043700025 + 14713177522176 = 14370005^2 + 3835776^2 .

It is a cyclic number.

It is not a de Polignac number, because 221210221222201 - 2⁷ = 221210221222073 is a prime.

It is not a weakly prime, because it can be changed into another prime (221219221222201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605110611100 + 110605110611101.

It is an arithmetic number, because the mean of its divisors is an integer number (110605110611101).

Almost surely, 2^{221210221222201} is an apocalyptic number.

It is an amenable number.

221210221222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210221222201 is an equidigital number, since it uses as much as digits as its factorization.

221210221222201 is an evil number, because the sum of its binary digits is even.

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

Adding to 221210221222201 its reverse (102222122012122), we get a palindrome (323432343234323).

The spelling of 221210221222201 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred one".