11821233 has 4 divisors (see below), whose sum is σ = 15761648. Its totient is φ = 7880820.

The previous prime is 11821231. The next prime is 11821237. The reversal of 11821233 is 33212811.

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 not a de Polignac number, because 11821233 - 2¹ = 11821231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11821231) 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, 1970203 + ... + 1970208.

It is an arithmetic number, because the mean of its divisors is an integer number (3940412).

Almost surely, 2^11821233 is an apocalyptic number.

It is an amenable number.

11821233 is a deficient number, since it is larger than the sum of its proper divisors (3940415).

11821233 is an equidigital number, since it uses as much as digits as its factorization.

11821233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940414.

The product of its digits is 288, while the sum is 21.

The square root of 11821233 is about 3438.2020010465. The cubic root of 11821233 is about 227.8002829417.

It can be divided in two parts, 1182 and 1233, that added together give a triangular number (2415 = T₆₉).

The spelling of 11821233 in words is "eleven million, eight hundred twenty-one thousand, two hundred thirty-three".