331221332101987 has 2 divisors, whose sum is σ = 331221332101988. Its totient is φ = 331221332101986.

The previous prime is 331221332101981. The next prime is 331221332102113. The reversal of 331221332101987 is 789101233122133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331221332101987 - 2³⁹ = 330671576288099 is a prime.

It is not a weakly prime, because it can be changed into another prime (331221332101981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610666050993 + 165610666050994.

It is an arithmetic number, because the mean of its divisors is an integer number (165610666050994).

Almost surely, 2^{331221332101987} is an apocalyptic number.

331221332101987 is a deficient number, since it is larger than the sum of its proper divisors (1).

331221332101987 is an equidigital number, since it uses as much as digits as its factorization.

331221332101987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 331221332101987 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, three hundred thirty-two million, one hundred one thousand, nine hundred eighty-seven".