231021310223220 has 192 divisors, whose sum is σ = 747187269292800. Its totient is φ = 52709865226240.

The previous prime is 231021310223191. The next prime is 231021310223311. The reversal of 231021310223220 is 22322013120132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 867947116 + ... + 868213244.

It is an arithmetic number, because the mean of its divisors is an integer number (3891600360900).

Almost surely, 2^{231021310223220} is an apocalyptic number.

231021310223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231021310223220 is an abundant number, since it is smaller than the sum of its proper divisors (516165959069580).

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

231021310223220 is a wasteful number, since it uses less digits than its factorization.

231021310223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343538 (or 343536 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 231021310223220 its reverse (22322013120132), we get a palindrome (253343323343352).

The spelling of 231021310223220 in words is "two hundred thirty-one trillion, twenty-one billion, three hundred ten million, two hundred twenty-three thousand, two hundred twenty".