121056860909 has 2 divisors, whose sum is σ = 121056860910. Its totient is φ = 121056860908.

The previous prime is 121056860891. The next prime is 121056860933. The reversal of 121056860909 is 909068650121.

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., 85367983684 + 35688877225 = 292178^2 + 188915^2 .

It is a cyclic number.

It is not a de Polignac number, because 121056860909 - 2⁸ = 121056860653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121056860009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60528430454 + 60528430455.

It is an arithmetic number, because the mean of its divisors is an integer number (60528430455).

Almost surely, 2^121056860909 is an apocalyptic number.

It is an amenable number.

121056860909 is a deficient number, since it is larger than the sum of its proper divisors (1).

121056860909 is an equidigital number, since it uses as much as digits as its factorization.

121056860909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 121056860909 in words is "one hundred twenty-one billion, fifty-six million, eight hundred sixty thousand, nine hundred nine".