121439765593 has 2 divisors, whose sum is σ = 121439765594. Its totient is φ = 121439765592.

The previous prime is 121439765539. The next prime is 121439765633. The reversal of 121439765593 is 395567934121.

Together with previous prime (121439765539) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84046648464 + 37393117129 = 289908^2 + 193373^2 .

It is an emirp because it is prime and its reverse (395567934121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121439765593 is a prime.

It is a super-3 number, since 3×121439765593³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121439765093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60719882796 + 60719882797.

It is an arithmetic number, because the mean of its divisors is an integer number (60719882797).

Almost surely, 2^121439765593 is an apocalyptic number.

It is an amenable number.

121439765593 is a deficient number, since it is larger than the sum of its proper divisors (1).

121439765593 is an equidigital number, since it uses as much as digits as its factorization.

121439765593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 55.

The spelling of 121439765593 in words is "one hundred twenty-one billion, four hundred thirty-nine million, seven hundred sixty-five thousand, five hundred ninety-three".