220123320173 has 2 divisors, whose sum is σ = 220123320174. Its totient is φ = 220123320172.

The previous prime is 220123320107. The next prime is 220123320181. The reversal of 220123320173 is 371023321022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187027706089 + 33095614084 = 432467^2 + 181922^2 .

It is a cyclic number.

It is not a de Polignac number, because 220123320173 - 2⁸ = 220123319917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220123320073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110061660086 + 110061660087.

It is an arithmetic number, because the mean of its divisors is an integer number (110061660087).

Almost surely, 2^220123320173 is an apocalyptic number.

It is an amenable number.

220123320173 is a deficient number, since it is larger than the sum of its proper divisors (1).

220123320173 is an equidigital number, since it uses as much as digits as its factorization.

220123320173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 220123320173 its reverse (371023321022), we get a palindrome (591146641195).

The spelling of 220123320173 in words is "two hundred twenty billion, one hundred twenty-three million, three hundred twenty thousand, one hundred seventy-three".