121785351959 has 2 divisors, whose sum is σ = 121785351960. Its totient is φ = 121785351958.

The previous prime is 121785351953. The next prime is 121785351977. The reversal of 121785351959 is 959153587121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121785351959 - 2⁸ = 121785351703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121785351953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60892675979 + 60892675980.

It is an arithmetic number, because the mean of its divisors is an integer number (60892675980).

Almost surely, 2^121785351959 is an apocalyptic number.

121785351959 is a deficient number, since it is larger than the sum of its proper divisors (1).

121785351959 is an equidigital number, since it uses as much as digits as its factorization.

121785351959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 56.

The spelling of 121785351959 in words is "one hundred twenty-one billion, seven hundred eighty-five million, three hundred fifty-one thousand, nine hundred fifty-nine".