121335438689 has 2 divisors, whose sum is σ = 121335438690. Its totient is φ = 121335438688.

The previous prime is 121335438683. The next prime is 121335438739. The reversal of 121335438689 is 986834533121.

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., 120674948689 + 660490000 = 347383^2 + 25700^2 .

It is a cyclic number.

It is not a de Polignac number, because 121335438689 - 2³⁶ = 52615961953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121335438689.

It is not a weakly prime, because it can be changed into another prime (121335438683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60667719344 + 60667719345.

It is an arithmetic number, because the mean of its divisors is an integer number (60667719345).

Almost surely, 2^121335438689 is an apocalyptic number.

It is an amenable number.

121335438689 is a deficient number, since it is larger than the sum of its proper divisors (1).

121335438689 is an equidigital number, since it uses as much as digits as its factorization.

121335438689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 53.

The spelling of 121335438689 in words is "one hundred twenty-one billion, three hundred thirty-five million, four hundred thirty-eight thousand, six hundred eighty-nine".