11050821 has 12 divisors (see below), whose sum is σ = 16224780. Its totient is φ = 7246080.

The previous prime is 11050811. The next prime is 11050841. The reversal of 11050821 is 12805011.

11050821 is digitally balanced in base 2, 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 2 ways, for example, as 4730625 + 6320196 = 2175^2 + 2514^2 .

It is not a de Polignac number, because 11050821 - 2⁷ = 11050693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11050794 and 11050803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11050801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9516 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (1352065).

Almost surely, 2^11050821 is an apocalyptic number.

It is an amenable number.

11050821 is a deficient number, since it is larger than the sum of its proper divisors (5173959).

11050821 is a wasteful number, since it uses less digits than its factorization.

11050821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20196 (or 20193 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 11050821 is about 3324.2775154911. The cubic root of 11050821 is about 222.7399826200.

Adding to 11050821 its reverse (12805011), we get a palindrome (23855832).

The spelling of 11050821 in words is "eleven million, fifty thousand, eight hundred twenty-one".