321320112 has 40 divisors (see below), whose sum is σ = 832498800. Its totient is φ = 106794240.

The previous prime is 321320081. The next prime is 321320113. The reversal of 321320112 is 211023123.

It is a super-2 number, since 2×321320112² = 206493228751385088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321320091 and 321320100.

It is not an unprimeable number, because it can be changed into a prime (321320113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7162 + ... + 26342.

It is an arithmetic number, because the mean of its divisors is an integer number (20812470).

Almost surely, 2^321320112 is an apocalyptic number.

It is an amenable number.

321320112 is an abundant number, since it is smaller than the sum of its proper divisors (511178688).

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

321320112 is a wasteful number, since it uses less digits than its factorization.

321320112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19541 (or 19535 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 321320112 is about 17925.4040958635. The cubic root of 321320112 is about 684.9296548076.

Adding to 321320112 its reverse (211023123), we get a palindrome (532343235).

The spelling of 321320112 in words is "three hundred twenty-one million, three hundred twenty thousand, one hundred twelve".