11061821 has 4 divisors (see below), whose sum is σ = 11106144. Its totient is φ = 11017500.

The previous prime is 11061811. The next prime is 11061833. The reversal of 11061821 is 12816011.

11061821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11061821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11061793 and 11061802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11061811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21785 + ... + 22286.

It is an arithmetic number, because the mean of its divisors is an integer number (2776536).

Almost surely, 2^11061821 is an apocalyptic number.

It is an amenable number.

11061821 is a deficient number, since it is larger than the sum of its proper divisors (44323).

11061821 is an equidigital number, since it uses as much as digits as its factorization.

11061821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44322.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 11061821 is about 3325.9315988156. The cubic root of 11061821 is about 222.8138633239.

Adding to 11061821 its reverse (12816011), we get a palindrome (23877832).

The spelling of 11061821 in words is "eleven million, sixty-one thousand, eight hundred twenty-one".