11821023 has 6 divisors (see below), whose sum is σ = 17074824. Its totient is φ = 7880676.

The previous prime is 11820971. The next prime is 11821027. The reversal of 11821023 is 32012811.

It is not a de Polignac number, because 11821023 - 2⁶ = 11820959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11820987 and 11821005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656715 + ... + 656732.

It is an arithmetic number, because the mean of its divisors is an integer number (2845804).

Almost surely, 2^11821023 is an apocalyptic number.

11821023 is a deficient number, since it is larger than the sum of its proper divisors (5253801).

11821023 is a wasteful number, since it uses less digits than its factorization.

11821023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313453 (or 1313450 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11821023 is about 3438.1714616930. The cubic root of 11821023 is about 227.7989340034.

Adding to 11821023 its reverse (32012811), we get a palindrome (43833834).

The spelling of 11821023 in words is "eleven million, eight hundred twenty-one thousand, twenty-three".