11018521 has 8 divisors (see below), whose sum is σ = 11518920. Its totient is φ = 10526208.

The previous prime is 11018507. The next prime is 11018549. The reversal of 11018521 is 12581011.

It is a happy number.

11018521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2975625 + 8042896 = 1725^2 + 2836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11018521 - 2¹⁷ = 10887449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11018591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (1439865).

Almost surely, 2^11018521 is an apocalyptic number.

It is an amenable number.

11018521 is a deficient number, since it is larger than the sum of its proper divisors (500399).

11018521 is an equidigital number, since it uses as much as digits as its factorization.

11018521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 11018521 is about 3319.4157618473. The cubic root of 11018521 is about 222.5227582663.

Adding to 11018521 its reverse (12581011), we get a palindrome (23599532).

The spelling of 11018521 in words is "eleven million, eighteen thousand, five hundred twenty-one".