121164391243393 has 2 divisors, whose sum is σ = 121164391243394. Its totient is φ = 121164391243392.

The previous prime is 121164391243277. The next prime is 121164391243417. The reversal of 121164391243393 is 393342193461121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121046380443664 + 118010799729 = 11002108^2 + 343527^2 .

It is a cyclic number.

It is not a de Polignac number, because 121164391243393 - 2²⁹ = 121163854372481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121164391243393.

It is not a weakly prime, because it can be changed into another prime (121164391240393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60582195621696 + 60582195621697.

It is an arithmetic number, because the mean of its divisors is an integer number (60582195621697).

Almost surely, 2^{121164391243393} is an apocalyptic number.

It is an amenable number.

121164391243393 is a deficient number, since it is larger than the sum of its proper divisors (1).

121164391243393 is an equidigital number, since it uses as much as digits as its factorization.

121164391243393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 52.

The spelling of 121164391243393 in words is "one hundred twenty-one trillion, one hundred sixty-four billion, three hundred ninety-one million, two hundred forty-three thousand, three hundred ninety-three".