1200313220173 has 2 divisors, whose sum is σ = 1200313220174. Its totient is φ = 1200313220172.

The previous prime is 1200313220167. The next prime is 1200313220251. The reversal of 1200313220173 is 3710223130021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180606114249 + 19707105924 = 1086557^2 + 140382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200313220173 - 2⁹ = 1200313219661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200313220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600156610086 + 600156610087.

It is an arithmetic number, because the mean of its divisors is an integer number (600156610087).

Almost surely, 2^{1200313220173} is an apocalyptic number.

It is an amenable number.

1200313220173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200313220173 is an equidigital number, since it uses as much as digits as its factorization.

1200313220173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 1200313220173 its reverse (3710223130021), we get a palindrome (4910536350194).

The spelling of 1200313220173 in words is "one trillion, two hundred billion, three hundred thirteen million, two hundred twenty thousand, one hundred seventy-three".