321022221001987 has 2 divisors, whose sum is σ = 321022221001988. Its totient is φ = 321022221001986.

The previous prime is 321022221001967. The next prime is 321022221002069. The reversal of 321022221001987 is 789100122220123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321022221001987 - 2¹¹ = 321022220999939 is a prime.

It is not a weakly prime, because it can be changed into another prime (321022221001967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160511110500993 + 160511110500994.

It is an arithmetic number, because the mean of its divisors is an integer number (160511110500994).

Almost surely, 2^{321022221001987} is an apocalyptic number.

321022221001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

321022221001987 is an equidigital number, since it uses as much as digits as its factorization.

321022221001987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 321022221001987 in words is "three hundred twenty-one trillion, twenty-two billion, two hundred twenty-one million, one thousand, nine hundred eighty-seven".