986318742221 has 2 divisors, whose sum is σ = 986318742222. Its totient is φ = 986318742220.

The previous prime is 986318742173. The next prime is 986318742289. The reversal of 986318742221 is 122247813689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548717970025 + 437600772196 = 740755^2 + 661514^2 .

It is an emirp because it is prime and its reverse (122247813689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 986318742221 - 2¹⁴ = 986318725837 is a prime.

It is a super-2 number, since 2×986318742221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986318742121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493159371110 + 493159371111.

It is an arithmetic number, because the mean of its divisors is an integer number (493159371111).

Almost surely, 2^986318742221 is an apocalyptic number.

It is an amenable number.

986318742221 is a deficient number, since it is larger than the sum of its proper divisors (1).

986318742221 is an equidigital number, since it uses as much as digits as its factorization.

986318742221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 53.

The spelling of 986318742221 in words is "nine hundred eighty-six billion, three hundred eighteen million, seven hundred forty-two thousand, two hundred twenty-one".