1320446312621 has 2 divisors, whose sum is σ = 1320446312622. Its totient is φ = 1320446312620.

The previous prime is 1320446312579. The next prime is 1320446312671. The reversal of 1320446312621 is 1262136440231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221000690121 + 99445622500 = 1104989^2 + 315350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320446312621 - 2¹⁸ = 1320446050477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320446312671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660223156310 + 660223156311.

It is an arithmetic number, because the mean of its divisors is an integer number (660223156311).

Almost surely, 2^{1320446312621} is an apocalyptic number.

It is an amenable number.

1320446312621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320446312621 is an equidigital number, since it uses as much as digits as its factorization.

1320446312621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 1320446312621 in words is "one trillion, three hundred twenty billion, four hundred forty-six million, three hundred twelve thousand, six hundred twenty-one".