31231302321000 has 128 divisors (see below), whose sum is σ = 99818289567360. Its totient is φ = 8125216832000.

The previous prime is 31231302320899. The next prime is 31231302321001. The reversal of 31231302321000 is 12320313213.

It is not an unprimeable number, because it can be changed into a prime (31231302321001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 126833514 + ... + 127079513.

It is an arithmetic number, because the mean of its divisors is an integer number (779830387245).

Almost surely, 2^{31231302321000} is an apocalyptic number.

31231302321000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31231302321000 is an abundant number, since it is smaller than the sum of its proper divisors (68586987246360).

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

31231302321000 is a wasteful number, since it uses less digits than its factorization.

31231302321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253913092 (or 253913078 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31231302321000 its reverse (12320313213), we get a palindrome (31243622634213).

The spelling of 31231302321000 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred two million, three hundred twenty-one thousand".