11227821 has 8 divisors (see below), whose sum is σ = 16331424. Its totient is φ = 6804720.

The previous prime is 11227819. The next prime is 11227849. The reversal of 11227821 is 12872211.

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

It is not a de Polignac number, because 11227821 - 2¹ = 11227819 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11227791 and 11227800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11227861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170086 + ... + 170151.

It is an arithmetic number, because the mean of its divisors is an integer number (2041428).

Almost surely, 2^11227821 is an apocalyptic number.

11227821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11227821 is a deficient number, since it is larger than the sum of its proper divisors (5103603).

11227821 is a wasteful number, since it uses less digits than its factorization.

11227821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340251.

The product of its digits is 448, while the sum is 24.

The square root of 11227821 is about 3350.7940849894. The cubic root of 11227821 is about 223.9228914549.

The spelling of 11227821 in words is "eleven million, two hundred twenty-seven thousand, eight hundred twenty-one".