21230323123 has 8 divisors (see below), whose sum is σ = 21918540800. Its totient is φ = 20542316040.

The previous prime is 21230323117. The next prime is 21230323133. The reversal of 21230323123 is 32132303212.

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 21230323123 - 2⁵ = 21230323091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230323094 and 21230323103.

It is not an unprimeable number, because it can be changed into a prime (21230323133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166828 + ... + 265126.

It is an arithmetic number, because the mean of its divisors is an integer number (2739817600).

Almost surely, 2^21230323123 is an apocalyptic number.

21230323123 is a deficient number, since it is larger than the sum of its proper divisors (688217677).

21230323123 is an equidigital number, since it uses as much as digits as its factorization.

21230323123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105297.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21230323123 its reverse (32132303212), we get a palindrome (53362626335).

The spelling of 21230323123 in words is "twenty-one billion, two hundred thirty million, three hundred twenty-three thousand, one hundred twenty-three".