21232323123 has 8 divisors (see below), whose sum is σ = 30883379136. Its totient is φ = 12868074600.

The previous prime is 21232323103. The next prime is 21232323143. The reversal of 21232323123 is 32132323212.

It is an interprime number because it is at equal distance from previous prime (21232323103) and next prime (21232323143).

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

It is not a de Polignac number, because 21232323123 - 2⁹ = 21232322611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21232323093 and 21232323102.

It is not an unprimeable number, because it can be changed into a prime (21232323103) 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, 321701833 + ... + 321701898.

It is an arithmetic number, because the mean of its divisors is an integer number (3860422392).

Almost surely, 2^21232323123 is an apocalyptic number.

21232323123 is a deficient number, since it is larger than the sum of its proper divisors (9651056013).

21232323123 is a wasteful number, since it uses less digits than its factorization.

21232323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643403745.

The product of its digits is 2592, while the sum is 24.

Adding to 21232323123 its reverse (32132323212), we get a palindrome (53364646335).

It can be divided in two parts, 2123 and 2323123, that added together give a triangular number (2325246 = T₂₁₅₆).

The spelling of 21232323123 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-three thousand, one hundred twenty-three".