1288741847021 has 2 divisors, whose sum is σ = 1288741847022. Its totient is φ = 1288741847020.

The previous prime is 1288741846979. The next prime is 1288741847089. The reversal of 1288741847021 is 1207481478821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1126240950025 + 162500896996 = 1061245^2 + 403114^2 .

It is an emirp because it is prime and its reverse (1207481478821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1288741847021 - 2¹⁸ = 1288741584877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288741847621) 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, 644370923510 + 644370923511.

It is an arithmetic number, because the mean of its divisors is an integer number (644370923511).

Almost surely, 2^{1288741847021} is an apocalyptic number.

It is an amenable number.

1288741847021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288741847021 is an equidigital number, since it uses as much as digits as its factorization.

1288741847021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1605632, while the sum is 53.

The spelling of 1288741847021 in words is "one trillion, two hundred eighty-eight billion, seven hundred forty-one million, eight hundred forty-seven thousand, twenty-one".