21332332123 has 4 divisors (see below), whose sum is σ = 22259824848. Its totient is φ = 20404839400.

The previous prime is 21332332097. The next prime is 21332332199. The reversal of 21332332123 is 32123323312.

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 21332332123 - 2²⁵ = 21298777691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332333123) 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 3 ways as a sum of consecutive naturals, for example, 463746328 + ... + 463746373.

It is an arithmetic number, because the mean of its divisors is an integer number (5564956212).

Almost surely, 2^21332332123 is an apocalyptic number.

21332332123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21332332123 is a deficient number, since it is larger than the sum of its proper divisors (927492725).

21332332123 is an equidigital number, since it uses as much as digits as its factorization.

21332332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927492724.

The product of its digits is 3888, while the sum is 25.

Adding to 21332332123 its reverse (32123323312), we get a palindrome (53455655435).

The spelling of 21332332123 in words is "twenty-one billion, three hundred thirty-two million, three hundred thirty-two thousand, one hundred twenty-three".