11000221109509 has 2 divisors, whose sum is σ = 11000221109510. Its totient is φ = 11000221109508.

The previous prime is 11000221109489. The next prime is 11000221109561. The reversal of 11000221109509 is 90590112200011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6636404558884 + 4363816550625 = 2576122^2 + 2088975^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000221109509 - 2¹¹ = 11000221107461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000221109309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500110554754 + 5500110554755.

It is an arithmetic number, because the mean of its divisors is an integer number (5500110554755).

Almost surely, 2^{11000221109509} is an apocalyptic number.

It is an amenable number.

11000221109509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000221109509 is an equidigital number, since it uses as much as digits as its factorization.

11000221109509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The spelling of 11000221109509 in words is "eleven trillion, two hundred twenty-one million, one hundred nine thousand, five hundred nine".