11028821 has 2 divisors, whose sum is σ = 11028822. Its totient is φ = 11028820.

The previous prime is 11028763. The next prime is 11028827. The reversal of 11028821 is 12882011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 46225 = 3314^2 + 215^2 .

It is an emirp because it is prime and its reverse (12882011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11028821 - 2⁶ = 11028757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11028827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5514410 + 5514411.

It is an arithmetic number, because the mean of its divisors is an integer number (5514411).

Almost surely, 2^11028821 is an apocalyptic number.

It is an amenable number.

11028821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11028821 is an equidigital number, since it uses as much as digits as its factorization.

11028821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 11028821 is about 3320.9668772814. The cubic root of 11028821 is about 222.5920740001.

The spelling of 11028821 in words is "eleven million, twenty-eight thousand, eight hundred twenty-one".