11236821 has 4 divisors (see below), whose sum is σ = 14982432. Its totient is φ = 7491212.

The previous prime is 11236793. The next prime is 11236831. The reversal of 11236821 is 12863211.

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 not a de Polignac number, because 11236821 - 2²² = 7042517 is a prime.

It is a super-2 number, since 2×11236821² = 252532292372082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11236791 and 11236800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11236831) 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, 1872801 + ... + 1872806.

It is an arithmetic number, because the mean of its divisors is an integer number (3745608).

Almost surely, 2^11236821 is an apocalyptic number.

It is an amenable number.

11236821 is a deficient number, since it is larger than the sum of its proper divisors (3745611).

11236821 is an equidigital number, since it uses as much as digits as its factorization.

11236821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745610.

The product of its digits is 576, while the sum is 24.

The square root of 11236821 is about 3352.1367812188. The cubic root of 11236821 is about 223.9827062010.

The spelling of 11236821 in words is "eleven million, two hundred thirty-six thousand, eight hundred twenty-one".