231310123221 has 8 divisors (see below), whose sum is σ = 308416212064. Its totient is φ = 154205391600.

The previous prime is 231310123211. The next prime is 231310123223. The reversal of 231310123221 is 122321013132.

231310123221 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 231310123221 - 2²¹ = 231308026069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310123223) 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, 165771 + ... + 700071.

It is an arithmetic number, because the mean of its divisors is an integer number (38552026508).

Almost surely, 2^231310123221 is an apocalyptic number.

It is an amenable number.

231310123221 is a deficient number, since it is larger than the sum of its proper divisors (77106088843).

231310123221 is a wasteful number, since it uses less digits than its factorization.

231310123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678611.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231310123221 its reverse (122321013132), we get a palindrome (353631136353).

The spelling of 231310123221 in words is "two hundred thirty-one billion, three hundred ten million, one hundred twenty-three thousand, two hundred twenty-one".