1021304040989 has 2 divisors, whose sum is σ = 1021304040990. Its totient is φ = 1021304040988.

The previous prime is 1021304040979. The next prime is 1021304041033. The reversal of 1021304040989 is 9890404031201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881424300964 + 139879740025 = 938842^2 + 374005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021304040989 - 2⁴ = 1021304040973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021304040919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510652020494 + 510652020495.

It is an arithmetic number, because the mean of its divisors is an integer number (510652020495).

Almost surely, 2^{1021304040989} is an apocalyptic number.

It is an amenable number.

1021304040989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021304040989 is an equidigital number, since it uses as much as digits as its factorization.

1021304040989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 1021304040989 in words is "one trillion, twenty-one billion, three hundred four million, forty thousand, nine hundred eighty-nine".