321031310112 has 72 divisors (see below), whose sum is σ = 913559708880. Its totient is φ = 106936951680.

The previous prime is 321031310077. The next prime is 321031310113. The reversal of 321031310112 is 211013130123.

321031310112 is a `hidden beast` number, since 3 + 210 + 31 + 310 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×321031310112² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (321031310113) 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 11 ways as a sum of consecutive naturals, for example, 38187 + ... + 802197.

It is an arithmetic number, because the mean of its divisors is an integer number (12688329290).

Almost surely, 2^321031310112 is an apocalyptic number.

321031310112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321031310112 is an abundant number, since it is smaller than the sum of its proper divisors (592528398768).

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

321031310112 is a wasteful number, since it uses less digits than its factorization.

321031310112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765486 (or 765475 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 321031310112 its reverse (211013130123), we get a palindrome (532044440235).

The spelling of 321031310112 in words is "three hundred twenty-one billion, thirty-one million, three hundred ten thousand, one hundred twelve".