11317021 has 2 divisors, whose sum is σ = 11317022. Its totient is φ = 11317020.

The previous prime is 11317013. The next prime is 11317049. The reversal of 11317021 is 12071311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 168100 = 3339^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 11317021 - 2³ = 11317013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11316986 and 11317004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11317001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5658510 + 5658511.

It is an arithmetic number, because the mean of its divisors is an integer number (5658511).

Almost surely, 2^11317021 is an apocalyptic number.

It is an amenable number.

11317021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11317021 is an equidigital number, since it uses as much as digits as its factorization.

11317021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 11317021 is about 3364.0780311996. The cubic root of 11317021 is about 224.5143169723.

Adding to 11317021 its reverse (12071311), we get a palindrome (23388332).

The spelling of 11317021 in words is "eleven million, three hundred seventeen thousand, twenty-one".