11233320021 has 72 divisors (see below), whose sum is σ = 20679235200. Its totient is φ = 5810474880.

The previous prime is 11233320001. The next prime is 11233320029. The reversal of 11233320021 is 12002333211.

11233320021 is a `hidden beast` number, since 112 + 333 + 200 + 21 = 666.

It is not a de Polignac number, because 11233320021 - 2⁹ = 11233319509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11233319976 and 11233320003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233320029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1154545 + ... + 1164233.

It is an arithmetic number, because the mean of its divisors is an integer number (287211600).

Almost surely, 2^11233320021 is an apocalyptic number.

11233320021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11233320021 is a deficient number, since it is larger than the sum of its proper divisors (9445915179).

11233320021 is a wasteful number, since it uses less digits than its factorization.

11233320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9959 (or 9949 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 11233320021 its reverse (12002333211), we get a palindrome (23235653232).

The spelling of 11233320021 in words is "eleven billion, two hundred thirty-three million, three hundred twenty thousand, twenty-one".