11221657 has 2 divisors, whose sum is σ = 11221658. Its totient is φ = 11221656.

The previous prime is 11221643. The next prime is 11221663. The reversal of 11221657 is 75612211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6095961 + 5125696 = 2469^2 + 2264^2 .

It is an emirp because it is prime and its reverse (75612211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221657 - 2¹⁵ = 11188889 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610828 + 5610829.

It is an arithmetic number, because the mean of its divisors is an integer number (5610829).

Almost surely, 2^11221657 is an apocalyptic number.

It is an amenable number.

11221657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221657 is an equidigital number, since it uses as much as digits as its factorization.

11221657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 11221657 is about 3349.8741767416. The cubic root of 11221657 is about 223.8819065549.

Adding to 11221657 its reverse (75612211), we get a palindrome (86833868).

The spelling of 11221657 in words is "eleven million, two hundred twenty-one thousand, six hundred fifty-seven".