121003005817 has 2 divisors, whose sum is σ = 121003005818. Its totient is φ = 121003005816.

The previous prime is 121003005811. The next prime is 121003005821. The reversal of 121003005817 is 718500300121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105986709136 + 15016296681 = 325556^2 + 122541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121003005817 is a prime.

It is a super-3 number, since 3×121003005817³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121003005811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501502908 + 60501502909.

It is an arithmetic number, because the mean of its divisors is an integer number (60501502909).

Almost surely, 2^121003005817 is an apocalyptic number.

It is an amenable number.

121003005817 is a deficient number, since it is larger than the sum of its proper divisors (1).

121003005817 is an equidigital number, since it uses as much as digits as its factorization.

121003005817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 121003005817 its reverse (718500300121), we get a palindrome (839503305938).

The spelling of 121003005817 in words is "one hundred twenty-one billion, three million, five thousand, eight hundred seventeen".