213231123123 has 8 divisors (see below), whose sum is σ = 286353547200. Its totient is φ = 141131390568.

The previous prime is 213231123113. The next prime is 213231123169. The reversal of 213231123123 is 321321132312.

213231123123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 213231123123 - 2¹² = 213231119027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213231123093 and 213231123102.

It is not an unprimeable number, because it can be changed into a prime (213231123103) 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, 255672393 + ... + 255673226.

It is an arithmetic number, because the mean of its divisors is an integer number (35794193400).

Almost surely, 2^213231123123 is an apocalyptic number.

213231123123 is a deficient number, since it is larger than the sum of its proper divisors (73122424077).

213231123123 is a wasteful number, since it uses less digits than its factorization.

213231123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511345761.

The product of its digits is 1296, while the sum is 24.

Adding to 213231123123 its reverse (321321132312), we get a palindrome (534552255435).

The spelling of 213231123123 in words is "two hundred thirteen billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-three".