231311322012000 has 384 divisors, whose sum is σ = 759537352304640. Its totient is φ = 61539800678400.

The previous prime is 231311322011977. The next prime is 231311322012011. The reversal of 231311322012000 is 210223113132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9689232064 + ... + 9689255936.

It is an arithmetic number, because the mean of its divisors is an integer number (1977961854960).

Almost surely, 2^{231311322012000} is an apocalyptic number.

231311322012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231311322012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379768676152320).

231311322012000 is an abundant number, since it is smaller than the sum of its proper divisors (528226030292640).

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

231311322012000 is a wasteful number, since it uses less digits than its factorization.

231311322012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25743 (or 25725 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231311322012000 its reverse (210223113132), we get a palindrome (231521545125132).

The spelling of 231311322012000 in words is "two hundred thirty-one trillion, three hundred eleven billion, three hundred twenty-two million, twelve thousand".