21112033223 has 4 divisors (see below), whose sum is σ = 21117138120. Its totient is φ = 21106928328.

The previous prime is 21112033207. The next prime is 21112033237. The reversal of 21112033223 is 32233021112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112033223 - 2⁴ = 21112033207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112033195 and 21112033204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112032223) 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 3 ways as a sum of consecutive naturals, for example, 2546240 + ... + 2554517.

It is an arithmetic number, because the mean of its divisors is an integer number (5279284530).

Almost surely, 2^21112033223 is an apocalyptic number.

21112033223 is a deficient number, since it is larger than the sum of its proper divisors (5104897).

21112033223 is an equidigital number, since it uses as much as digits as its factorization.

21112033223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104896.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21112033223 its reverse (32233021112), we get a palindrome (53345054335).

The spelling of 21112033223 in words is "twenty-one billion, one hundred twelve million, thirty-three thousand, two hundred twenty-three".