231231030123 has 16 divisors (see below), whose sum is σ = 324562464000. Its totient is φ = 146028192480.

The previous prime is 231231030109. The next prime is 231231030133. The reversal of 231231030123 is 321030132132.

It is not a de Polignac number, because 231231030123 - 2¹⁷ = 231230899051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231231030123.

It is not an unprimeable number, because it can be changed into a prime (231231030133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525538 + ... + 859448.

It is an arithmetic number, because the mean of its divisors is an integer number (20285154000).

Almost surely, 2^231231030123 is an apocalyptic number.

231231030123 is a deficient number, since it is larger than the sum of its proper divisors (93331433877).

231231030123 is a wasteful number, since it uses less digits than its factorization.

231231030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346082.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231231030123 its reverse (321030132132), we get a palindrome (552261162255).

The spelling of 231231030123 in words is "two hundred thirty-one billion, two hundred thirty-one million, thirty thousand, one hundred twenty-three".