321113959987 has 2 divisors, whose sum is σ = 321113959988. Its totient is φ = 321113959986.

The previous prime is 321113959981. The next prime is 321113960033. The reversal of 321113959987 is 789959311123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321113959987 - 2¹¹ = 321113957939 is a prime.

It is a super-2 number, since 2×321113959987² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321113959981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160556979993 + 160556979994.

It is an arithmetic number, because the mean of its divisors is an integer number (160556979994).

Almost surely, 2^321113959987 is an apocalyptic number.

321113959987 is a deficient number, since it is larger than the sum of its proper divisors (1).

321113959987 is an equidigital number, since it uses as much as digits as its factorization.

321113959987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 58.

The spelling of 321113959987 in words is "three hundred twenty-one billion, one hundred thirteen million, nine hundred fifty-nine thousand, nine hundred eighty-seven".