121302656317 has 2 divisors, whose sum is σ = 121302656318. Its totient is φ = 121302656316.

The previous prime is 121302656297. The next prime is 121302656381. The reversal of 121302656317 is 713656203121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96332019876 + 24970636441 = 310374^2 + 158021^2 .

It is an emirp because it is prime and its reverse (713656203121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121302656317 - 2³⁵ = 86942917949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121302656417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60651328158 + 60651328159.

It is an arithmetic number, because the mean of its divisors is an integer number (60651328159).

Almost surely, 2^121302656317 is an apocalyptic number.

It is an amenable number.

121302656317 is a deficient number, since it is larger than the sum of its proper divisors (1).

121302656317 is an equidigital number, since it uses as much as digits as its factorization.

121302656317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

Adding to 121302656317 its reverse (713656203121), we get a palindrome (834958859438).

The spelling of 121302656317 in words is "one hundred twenty-one billion, three hundred two million, six hundred fifty-six thousand, three hundred seventeen".