231303311021 has 8 divisors (see below), whose sum is σ = 236257328640. Its totient is φ = 226350654768.

The previous prime is 231303311017. The next prime is 231303311033. The reversal of 231303311021 is 120113303132.

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 231303311021 - 2² = 231303311017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231303310984 and 231303311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231303311821) 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, 6860 + ... + 680186.

It is an arithmetic number, because the mean of its divisors is an integer number (29532166080).

Almost surely, 2^231303311021 is an apocalyptic number.

It is an amenable number.

231303311021 is a deficient number, since it is larger than the sum of its proper divisors (4954017619).

231303311021 is an equidigital number, since it uses as much as digits as its factorization.

231303311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680683.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 231303311021 its reverse (120113303132), we get a palindrome (351416614153).

The spelling of 231303311021 in words is "two hundred thirty-one billion, three hundred three million, three hundred eleven thousand, twenty-one".