231110211101213 has 4 divisors (see below), whose sum is σ = 234559617237120. Its totient is φ = 227660804965308.

The previous prime is 231110211101201. The next prime is 231110211101239. The reversal of 231110211101213 is 312101112011132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231110211101213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231110211101293) 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 3 ways as a sum of consecutive naturals, for example, 1724703067853 + ... + 1724703067986.

It is an arithmetic number, because the mean of its divisors is an integer number (58639904309280).

Almost surely, 2^{231110211101213} is an apocalyptic number.

It is an amenable number.

231110211101213 is a deficient number, since it is larger than the sum of its proper divisors (3449406135907).

231110211101213 is an equidigital number, since it uses as much as digits as its factorization.

231110211101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449406135906.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 231110211101213 its reverse (312101112011132), we get a palindrome (543211323112345).

The spelling of 231110211101213 in words is "two hundred thirty-one trillion, one hundred ten billion, two hundred eleven million, one hundred one thousand, two hundred thirteen".