11010021509 has 2 divisors, whose sum is σ = 11010021510. Its totient is φ = 11010021508.

The previous prime is 11010021499. The next prime is 11010021521. The reversal of 11010021509 is 90512001011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10238404225 + 771617284 = 101185^2 + 27778^2 .

It is an emirp because it is prime and its reverse (90512001011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11010021509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11010041509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505010754 + 5505010755.

It is an arithmetic number, because the mean of its divisors is an integer number (5505010755).

Almost surely, 2^11010021509 is an apocalyptic number.

It is an amenable number.

11010021509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010021509 is an equidigital number, since it uses as much as digits as its factorization.

11010021509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The spelling of 11010021509 in words is "eleven billion, ten million, twenty-one thousand, five hundred nine".