231231020321 has 8 divisors (see below), whose sum is σ = 269886662400. Its totient is φ = 193981038048.

The previous prime is 231231020309. The next prime is 231231020341. The reversal of 231231020321 is 123020132132.

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

It is not a de Polignac number, because 231231020321 - 2¹⁰ = 231231019297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231231020293 and 231231020302.

It is not an unprimeable number, because it can be changed into a prime (231231020341) 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, 351414596 + ... + 351415253.

It is an arithmetic number, because the mean of its divisors is an integer number (33735832800).

Almost surely, 2^231231020321 is an apocalyptic number.

It is an amenable number.

231231020321 is a deficient number, since it is larger than the sum of its proper divisors (38655642079).

231231020321 is an equidigital number, since it uses as much as digits as its factorization.

231231020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702829903.

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

Adding to 231231020321 its reverse (123020132132), we get a palindrome (354251152453).

The spelling of 231231020321 in words is "two hundred thirty-one billion, two hundred thirty-one million, twenty thousand, three hundred twenty-one".