121835502689 has 2 divisors, whose sum is σ = 121835502690. Its totient is φ = 121835502688.

The previous prime is 121835502661. The next prime is 121835502721. The reversal of 121835502689 is 986205538121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110366806225 + 11468696464 = 332215^2 + 107092^2 .

It is a cyclic number.

It is not a de Polignac number, because 121835502689 - 2⁸ = 121835502433 is a prime.

It is not a weakly prime, because it can be changed into another prime (121835502619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60917751344 + 60917751345.

It is an arithmetic number, because the mean of its divisors is an integer number (60917751345).

Almost surely, 2^121835502689 is an apocalyptic number.

It is an amenable number.

121835502689 is a deficient number, since it is larger than the sum of its proper divisors (1).

121835502689 is an equidigital number, since it uses as much as digits as its factorization.

121835502689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 121835502689 in words is "one hundred twenty-one billion, eight hundred thirty-five million, five hundred two thousand, six hundred eighty-nine".