231211102313 has 4 divisors (see below), whose sum is σ = 231293651028. Its totient is φ = 231128553600.

The previous prime is 231211102259. The next prime is 231211102327. The reversal of 231211102313 is 313201112132.

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 160482763609 + 70728338704 = 400603^2 + 265948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231211102313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231211102363) 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, 41270156 + ... + 41275757.

It is an arithmetic number, because the mean of its divisors is an integer number (57823412757).

Almost surely, 2^231211102313 is an apocalyptic number.

It is an amenable number.

231211102313 is a deficient number, since it is larger than the sum of its proper divisors (82548715).

231211102313 is an equidigital number, since it uses as much as digits as its factorization.

231211102313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82548714.

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

Adding to 231211102313 its reverse (313201112132), we get a palindrome (544412214445).

The spelling of 231211102313 in words is "two hundred thirty-one billion, two hundred eleven million, one hundred two thousand, three hundred thirteen".