231321202013 has 8 divisors (see below), whose sum is σ = 252361625376. Its totient is φ = 210282649200.

The previous prime is 231321202009. The next prime is 231321202069. The reversal of 231321202013 is 310202123132.

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 231321202013 - 2² = 231321202009 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 (231321202003) 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, 202523 + ... + 709688.

It is an arithmetic number, because the mean of its divisors is an integer number (31545203172).

Almost surely, 2^231321202013 is an apocalyptic number.

It is an amenable number.

231321202013 is a deficient number, since it is larger than the sum of its proper divisors (21040423363).

231321202013 is a wasteful number, since it uses less digits than its factorization.

231321202013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935275.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231321202013 its reverse (310202123132), we get a palindrome (541523325145).

It can be divided in two parts, 231321 and 202013, that added together give a palindrome (433334).

The spelling of 231321202013 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred two thousand, thirteen".