11002721 has 2 divisors, whose sum is σ = 11002722. Its totient is φ = 11002720.

The previous prime is 11002699. The next prime is 11002741. The reversal of 11002721 is 12720011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10962721 + 40000 = 3311^2 + 200^2 .

It is an emirp because it is prime and its reverse (12720011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11002721 - 2¹⁸ = 10740577 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11002696 and 11002705.

It is not a weakly prime, because it can be changed into another prime (11002741) 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, 5501360 + 5501361.

It is an arithmetic number, because the mean of its divisors is an integer number (5501361).

Almost surely, 2^11002721 is an apocalyptic number.

It is an amenable number.

11002721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11002721 is an equidigital number, since it uses as much as digits as its factorization.

11002721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 11002721 is about 3317.0349711753. The cubic root of 11002721 is about 222.4163452719.

Adding to 11002721 its reverse (12720011), we get a palindrome (23722732).

The spelling of 11002721 in words is "eleven million, two thousand, seven hundred twenty-one".