321131120112 has 240 divisors, whose sum is σ = 1019683057536. Its totient is φ = 93489984000.

The previous prime is 321131120083. The next prime is 321131120159. The reversal of 321131120112 is 211021131123.

321131120112 is a `hidden beast` number, since 321 + 1 + 311 + 20 + 1 + 12 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4116187 + ... + 4193477.

Almost surely, 2^321131120112 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 321131120112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509841528768).

321131120112 is an abundant number, since it is smaller than the sum of its proper divisors (698551937424).

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

321131120112 is a wasteful number, since it uses less digits than its factorization.

321131120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77420 (or 77411 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 321131120112 its reverse (211021131123), we get a palindrome (532152251235).

The spelling of 321131120112 in words is "three hundred twenty-one billion, one hundred thirty-one million, one hundred twenty thousand, one hundred twelve".