193243915121 has 2 divisors, whose sum is σ = 193243915122. Its totient is φ = 193243915120.

The previous prime is 193243915099. The next prime is 193243915141. The reversal of 193243915121 is 121519342391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105651001600 + 87592913521 = 325040^2 + 295961^2 .

It is an emirp because it is prime and its reverse (121519342391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193243915121 - 2¹⁸ = 193243652977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (193243915141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96621957560 + 96621957561.

It is an arithmetic number, because the mean of its divisors is an integer number (96621957561).

Almost surely, 2^193243915121 is an apocalyptic number.

It is an amenable number.

193243915121 is a deficient number, since it is larger than the sum of its proper divisors (1).

193243915121 is an equidigital number, since it uses as much as digits as its factorization.

193243915121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The spelling of 193243915121 in words is "one hundred ninety-three billion, two hundred forty-three million, nine hundred fifteen thousand, one hundred twenty-one".