11099821 has 2 divisors, whose sum is σ = 11099822. Its totient is φ = 11099820.

The previous prime is 11099791. The next prime is 11099831. The reversal of 11099821 is 12899011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7155625 + 3944196 = 2675^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 11099821 - 2¹¹ = 11097773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11099831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5549910 + 5549911.

It is an arithmetic number, because the mean of its divisors is an integer number (5549911).

Almost surely, 2^11099821 is an apocalyptic number.

It is an amenable number.

11099821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11099821 is an equidigital number, since it uses as much as digits as its factorization.

11099821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11099821 is about 3331.6393862482. The cubic root of 11099821 is about 223.0687113566.

The spelling of 11099821 in words is "eleven million, ninety-nine thousand, eight hundred twenty-one".