231321003020 has 24 divisors (see below), whose sum is σ = 487621167264. Its totient is φ = 92176580096.

The previous prime is 231321003013. The next prime is 231321003041. The reversal of 231321003020 is 20300123132.

It is a self number, because there is not a number n which added to its sum of digits gives 231321003020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21983429 + ... + 21993948.

It is an arithmetic number, because the mean of its divisors is an integer number (20317548636).

Almost surely, 2^231321003020 is an apocalyptic number.

231321003020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231321003020 is an abundant number, since it is smaller than the sum of its proper divisors (256300164244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231321003020 is a wasteful number, since it uses less digits than its factorization.

231321003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43977649 (or 43977647 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231321003020 its reverse (20300123132), we get a palindrome (251621126152).

The spelling of 231321003020 in words is "two hundred thirty-one billion, three hundred twenty-one million, three thousand, twenty".