221000212222201 has 2 divisors, whose sum is σ = 221000212222202. Its totient is φ = 221000212222200.

The previous prime is 221000212222187. The next prime is 221000212222217. The reversal of 221000212222201 is 102222212000122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142396011680400 + 78604200541801 = 11932980^2 + 8865901^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000212222201 - 2³³ = 220991622287609 is a prime.

It is not a weakly prime, because it can be changed into another prime (221000212222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500106111100 + 110500106111101.

It is an arithmetic number, because the mean of its divisors is an integer number (110500106111101).

Almost surely, 2^{221000212222201} is an apocalyptic number.

It is an amenable number.

221000212222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000212222201 is an equidigital number, since it uses as much as digits as its factorization.

221000212222201 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 19.

Adding to 221000212222201 its reverse (102222212000122), we get a palindrome (323222424222323).

The spelling of 221000212222201 in words is "two hundred twenty-one trillion, two hundred twelve million, two hundred twenty-two thousand, two hundred one".