231103123121 has 4 divisors (see below), whose sum is σ = 248880286452. Its totient is φ = 213325959792.

The previous prime is 231103123093. The next prime is 231103123157. The reversal of 231103123121 is 121321301132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99124225600 + 131978897521 = 314840^2 + 363289^2 .

It is a cyclic number.

It is not a de Polignac number, because 231103123121 - 2²⁶ = 231036014257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231103123093 and 231103123102.

It is not an unprimeable number, because it can be changed into a prime (231103123421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8888581646 + ... + 8888581671.

It is an arithmetic number, because the mean of its divisors is an integer number (62220071613).

Almost surely, 2^231103123121 is an apocalyptic number.

It is an amenable number.

231103123121 is a deficient number, since it is larger than the sum of its proper divisors (17777163331).

231103123121 is a wasteful number, since it uses less digits than its factorization.

231103123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17777163330.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231103123121 its reverse (121321301132), we get a palindrome (352424424253).

The spelling of 231103123121 in words is "two hundred thirty-one billion, one hundred three million, one hundred twenty-three thousand, one hundred twenty-one".