231321102013 has 8 divisors (see below), whose sum is σ = 234615242232. Its totient is φ = 228045520896.

The previous prime is 231321102011. The next prime is 231321102053. The reversal of 231321102013 is 310201123132.

It can be written as a sum of positive squares in 4 ways, for example, as 154466292484 + 76854809529 = 393022^2 + 277227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231321102013 - 2¹ = 231321102011 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 (231321102011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4614670 + ... + 4664527.

It is an arithmetic number, because the mean of its divisors is an integer number (29326905279).

Almost surely, 2^231321102013 is an apocalyptic number.

It is an amenable number.

231321102013 is a deficient number, since it is larger than the sum of its proper divisors (3294140219).

231321102013 is an equidigital number, since it uses as much as digits as its factorization.

231321102013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9279551.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231321102013 its reverse (310201123132), we get a palindrome (541522225145).

The spelling of 231321102013 in words is "two hundred thirty-one billion, three hundred twenty-one million, one hundred two thousand, thirteen".