921231302222317 has 2 divisors, whose sum is σ = 921231302222318. Its totient is φ = 921231302222316.

The previous prime is 921231302222299. The next prime is 921231302222327. The reversal of 921231302222317 is 713222203132129.

921231302222317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644727815203081 + 276503487019236 = 25391491^2 + 16628394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921231302222317 is a prime.

It is a super-2 number, since 2×921231302222317² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 921231302222317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921231302222327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460615651111158 + 460615651111159.

It is an arithmetic number, because the mean of its divisors is an integer number (460615651111159).

Almost surely, 2^{921231302222317} is an apocalyptic number.

It is an amenable number.

921231302222317 is a deficient number, since it is larger than the sum of its proper divisors (1).

921231302222317 is an equidigital number, since it uses as much as digits as its factorization.

921231302222317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 921231302222317 in words is "nine hundred twenty-one trillion, two hundred thirty-one billion, three hundred two million, two hundred twenty-two thousand, three hundred seventeen".