12221310173 has 2 divisors, whose sum is σ = 12221310174. Its totient is φ = 12221310172.

The previous prime is 12221310151. The next prime is 12221310187. The reversal of 12221310173 is 37101312221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9614390809 + 2606919364 = 98053^2 + 51058^2 .

It is an emirp because it is prime and its reverse (37101312221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12221310173 - 2¹² = 12221306077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221310973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110655086 + 6110655087.

It is an arithmetic number, because the mean of its divisors is an integer number (6110655087).

Almost surely, 2^12221310173 is an apocalyptic number.

It is an amenable number.

12221310173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221310173 is an equidigital number, since it uses as much as digits as its factorization.

12221310173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 12221310173 its reverse (37101312221), we get a palindrome (49322622394).

The spelling of 12221310173 in words is "twelve billion, two hundred twenty-one million, three hundred ten thousand, one hundred seventy-three".