21123332303 has 8 divisors (see below), whose sum is σ = 22367251872. Its totient is φ = 19879565056.

The previous prime is 21123332261. The next prime is 21123332311. The reversal of 21123332303 is 30323332112.

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

It is a cyclic number.

It is not a de Polignac number, because 21123332303 - 2⁸ = 21123332047 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 (21123332393) 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, 376451 + ... + 428907.

It is an arithmetic number, because the mean of its divisors is an integer number (2795906484).

Almost surely, 2^21123332303 is an apocalyptic number.

21123332303 is a deficient number, since it is larger than the sum of its proper divisors (1243919569).

21123332303 is a wasteful number, since it uses less digits than its factorization.

21123332303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76161.

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

Adding to 21123332303 its reverse (30323332112), we get a palindrome (51446664415).

The spelling of 21123332303 in words is "twenty-one billion, one hundred twenty-three million, three hundred thirty-two thousand, three hundred three".