11221406909 has 2 divisors, whose sum is σ = 11221406910. Its totient is φ = 11221406908.

The previous prime is 11221406831. The next prime is 11221406921. The reversal of 11221406909 is 90960412211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11210150884 + 11256025 = 105878^2 + 3355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221406909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221406309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610703454 + 5610703455.

It is an arithmetic number, because the mean of its divisors is an integer number (5610703455).

Almost surely, 2^11221406909 is an apocalyptic number.

It is an amenable number.

11221406909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221406909 is an equidigital number, since it uses as much as digits as its factorization.

11221406909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 11221406909 in words is "eleven billion, two hundred twenty-one million, four hundred six thousand, nine hundred nine".