21333223103 has 4 divisors (see below), whose sum is σ = 21335006568. Its totient is φ = 21331439640.

The previous prime is 21333223069. The next prime is 21333223111. The reversal of 21333223103 is 30132233312.

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 21333223103 - 2⁶ = 21333223039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333223133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873668 + ... + 897753.

It is an arithmetic number, because the mean of its divisors is an integer number (5333751642).

Almost surely, 2^21333223103 is an apocalyptic number.

21333223103 is a deficient number, since it is larger than the sum of its proper divisors (1783465).

21333223103 is a wasteful number, since it uses less digits than its factorization.

21333223103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783464.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21333223103 its reverse (30132233312), we get a palindrome (51465456415).

The spelling of 21333223103 in words is "twenty-one billion, three hundred thirty-three million, two hundred twenty-three thousand, one hundred three".