222221002100173 has 2 divisors, whose sum is σ = 222221002100174. Its totient is φ = 222221002100172.

The previous prime is 222221002100129. The next prime is 222221002100177. The reversal of 222221002100173 is 371001200122222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179086542111684 + 43134459988489 = 13382322^2 + 6567683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222221002100173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221002100177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110501050086 + 111110501050087.

It is an arithmetic number, because the mean of its divisors is an integer number (111110501050087).

Almost surely, 2^{222221002100173} is an apocalyptic number.

It is an amenable number.

222221002100173 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221002100173 is an equidigital number, since it uses as much as digits as its factorization.

222221002100173 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 222221002100173 its reverse (371001200122222), we get a palindrome (593222202222395).

The spelling of 222221002100173 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two million, one hundred thousand, one hundred seventy-three".