11221709 has 2 divisors, whose sum is σ = 11221710. Its totient is φ = 11221708.

The previous prime is 11221697. The next prime is 11221739. The reversal of 11221709 is 90712211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7963684 + 3258025 = 2822^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221709 - 2⁸ = 11221453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610854 + 5610855.

It is an arithmetic number, because the mean of its divisors is an integer number (5610855).

Almost surely, 2^11221709 is an apocalyptic number.

It is an amenable number.

11221709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221709 is an equidigital number, since it uses as much as digits as its factorization.

11221709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 11221709 is about 3349.8819382181. The cubic root of 11221709 is about 223.8822523696.

The spelling of 11221709 in words is "eleven million, two hundred twenty-one thousand, seven hundred nine".