1320322420987 has 2 divisors, whose sum is σ = 1320322420988. Its totient is φ = 1320322420986.

The previous prime is 1320322420979. The next prime is 1320322421051. The reversal of 1320322420987 is 7890242230231.

It is a weak prime.

It is an emirp because it is prime and its reverse (7890242230231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320322420987 - 2³ = 1320322420979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320322426987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660161210493 + 660161210494.

It is an arithmetic number, because the mean of its divisors is an integer number (660161210494).

Almost surely, 2^{1320322420987} is an apocalyptic number.

1320322420987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320322420987 is an equidigital number, since it uses as much as digits as its factorization.

1320322420987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 1320322420987 in words is "one trillion, three hundred twenty billion, three hundred twenty-two million, four hundred twenty thousand, nine hundred eighty-seven".