222201212173 has 2 divisors, whose sum is σ = 222201212174. Its totient is φ = 222201212172.

The previous prime is 222201212117. The next prime is 222201212183. The reversal of 222201212173 is 371212102222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209693473929 + 12507738244 = 457923^2 + 111838^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201212173 - 2¹³ = 222201203981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222201212183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111100606086 + 111100606087.

It is an arithmetic number, because the mean of its divisors is an integer number (111100606087).

Almost surely, 2^222201212173 is an apocalyptic number.

It is an amenable number.

222201212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

222201212173 is an equidigital number, since it uses as much as digits as its factorization.

222201212173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 222201212173 its reverse (371212102222), we get a palindrome (593413314395).

The spelling of 222201212173 in words is "two hundred twenty-two billion, two hundred one million, two hundred twelve thousand, one hundred seventy-three".