21203333223 has 8 divisors (see below), whose sum is σ = 28804528368. Its totient is φ = 13868846784.

The previous prime is 21203333213. The next prime is 21203333231. The reversal of 21203333223 is 32233330212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21203333223 - 2¹⁸ = 21203071079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21203333193 and 21203333202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203333213) 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 7 ways as a sum of consecutive naturals, for example, 66676990 + ... + 66677307.

It is an arithmetic number, because the mean of its divisors is an integer number (3600566046).

Almost surely, 2^21203333223 is an apocalyptic number.

21203333223 is a deficient number, since it is larger than the sum of its proper divisors (7601195145).

21203333223 is a wasteful number, since it uses less digits than its factorization.

21203333223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133354353.

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21203333223 its reverse (32233330212), we get a palindrome (53436663435).

The spelling of 21203333223 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand, two hundred twenty-three".