231211323112133 has 16 divisors (see below), whose sum is σ = 285625655118720. Its totient is φ = 182256370370496.

The previous prime is 231211323112129. The next prime is 231211323112171. The reversal of 231211323112133 is 331211323112132.

It is a cyclic number.

It is not a de Polignac number, because 231211323112133 - 2² = 231211323112129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231211323112096 and 231211323112105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211323112183) 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, 4722621935 + ... + 4722670892.

It is an arithmetic number, because the mean of its divisors is an integer number (17851603444920).

Almost surely, 2^{231211323112133} is an apocalyptic number.

It is an amenable number.

231211323112133 is a deficient number, since it is larger than the sum of its proper divisors (54414332006587).

231211323112133 is a wasteful number, since it uses less digits than its factorization.

231211323112133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9445293116.

The product of its digits is 3888, while the sum is 29.

Adding to 231211323112133 its reverse (331211323112132), we get a palindrome (562422646224265).

Subtracting 231211323112133 from its reverse (331211323112132), we obtain a palindrome (99999999999999).

The spelling of 231211323112133 in words is "two hundred thirty-one trillion, two hundred eleven billion, three hundred twenty-three million, one hundred twelve thousand, one hundred thirty-three".