31321130020000 has 240 divisors, whose sum is σ = 77678232508800. Its totient is φ = 12427418880000.

The previous prime is 31321130019937. The next prime is 31321130020001. The reversal of 31321130020000 is 2003112313.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31321130020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1464209305 + ... + 1464230695.

It is an arithmetic number, because the mean of its divisors is an integer number (323659302120).

Almost surely, 2^{31321130020000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31321130020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38839116254400).

31321130020000 is an abundant number, since it is smaller than the sum of its proper divisors (46357102488800).

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

31321130020000 is a wasteful number, since it uses less digits than its factorization.

31321130020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22009 (or 21986 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31321130020000 its reverse (2003112313), we get a palindrome (31323133132313).

The spelling of 31321130020000 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred thirty million, twenty thousand".