11323520021 has 16 divisors (see below), whose sum is σ = 13083363648. Its totient is φ = 9685766400.

The previous prime is 11323519981. The next prime is 11323520027. The reversal of 11323520021 is 12002532311.

11323520021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11323520021 - 2²⁶ = 11256411157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11323519975 and 11323520002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323520027) 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 15 ways as a sum of consecutive naturals, for example, 876791 + ... + 889611.

It is an arithmetic number, because the mean of its divisors is an integer number (817710228).

Almost surely, 2^11323520021 is an apocalyptic number.

11323520021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11323520021 is a deficient number, since it is larger than the sum of its proper divisors (1759843627).

11323520021 is a wasteful number, since it uses less digits than its factorization.

11323520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17572.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 11323520021 in words is "eleven billion, three hundred twenty-three million, five hundred twenty thousand, twenty-one".