123201194917 has 2 divisors, whose sum is σ = 123201194918. Its totient is φ = 123201194916.

The previous prime is 123201194899. The next prime is 123201194933. The reversal of 123201194917 is 719491102321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122944201956 + 256992961 = 350634^2 + 16031^2 .

It is a cyclic number.

It is not a de Polignac number, because 123201194917 - 2⁷ = 123201194789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123201194917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123201164917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600597458 + 61600597459.

It is an arithmetic number, because the mean of its divisors is an integer number (61600597459).

Almost surely, 2^123201194917 is an apocalyptic number.

It is an amenable number.

123201194917 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201194917 is an equidigital number, since it uses as much as digits as its factorization.

123201194917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 123201194917 in words is "one hundred twenty-three billion, two hundred one million, one hundred ninety-four thousand, nine hundred seventeen".