11117021 has 2 divisors, whose sum is σ = 11117022. Its totient is φ = 11117020.

The previous prime is 11117011. The next prime is 11117077. The reversal of 11117021 is 12071111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10797796 + 319225 = 3286^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 11117021 - 2¹⁰ = 11115997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11116987 and 11117005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11117011) 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, 5558510 + 5558511.

It is an arithmetic number, because the mean of its divisors is an integer number (5558511).

Almost surely, 2^11117021 is an apocalyptic number.

It is an amenable number.

11117021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11117021 is an equidigital number, since it uses as much as digits as its factorization.

11117021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 11117021 is about 3334.2196988201. The cubic root of 11117021 is about 223.1838724253.

Adding to 11117021 its reverse (12071111), we get a palindrome (23188132).

The spelling of 11117021 in words is "eleven million, one hundred seventeen thousand, twenty-one".