121677316376657 has 2 divisors, whose sum is σ = 121677316376658. Its totient is φ = 121677316376656.

The previous prime is 121677316376599. The next prime is 121677316376719. The reversal of 121677316376657 is 756673613776121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74085544431616 + 47591771945041 = 8607296^2 + 6898679^2 .

It is a cyclic number.

It is not a de Polignac number, because 121677316376657 - 2⁸ = 121677316376401 is a prime.

It is not a weakly prime, because it can be changed into another prime (121677316376257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60838658188328 + 60838658188329.

It is an arithmetic number, because the mean of its divisors is an integer number (60838658188329).

Almost surely, 2^{121677316376657} is an apocalyptic number.

It is an amenable number.

121677316376657 is a deficient number, since it is larger than the sum of its proper divisors (1).

121677316376657 is an equidigital number, since it uses as much as digits as its factorization.

121677316376657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280052640, while the sum is 68.

The spelling of 121677316376657 in words is "one hundred twenty-one trillion, six hundred seventy-seven billion, three hundred sixteen million, three hundred seventy-six thousand, six hundred fifty-seven".