21232210323 has 8 divisors (see below), whose sum is σ = 28310681536. Its totient is φ = 14154273000.

The previous prime is 21232210309. The next prime is 21232210357. The reversal of 21232210323 is 32301223212.

It is a happy number.

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

It is not a de Polignac number, because 21232210323 - 2⁵ = 21232210291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21232210323.

It is not an unprimeable number, because it can be changed into a prime (21232211323) 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 7 ways as a sum of consecutive naturals, for example, 28993 + ... + 208098.

It is an arithmetic number, because the mean of its divisors is an integer number (3538835192).

Almost surely, 2^21232210323 is an apocalyptic number.

21232210323 is a deficient number, since it is larger than the sum of its proper divisors (7078471213).

21232210323 is a wasteful number, since it uses less digits than its factorization.

21232210323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266945.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21232210323 its reverse (32301223212), we get a palindrome (53533433535).

The spelling of 21232210323 in words is "twenty-one billion, two hundred thirty-two million, two hundred ten thousand, three hundred twenty-three".