321111345 has 64 divisors (see below), whose sum is σ = 555517440. Its totient is φ = 158054400.

The previous prime is 321111341. The next prime is 321111359. The reversal of 321111345 is 543111123.

It is not a de Polignac number, because 321111345 - 2² = 321111341 is a prime.

It is a super-2 number, since 2×321111345² = 206224991775418050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321111341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1142605 + ... + 1142885.

It is an arithmetic number, because the mean of its divisors is an integer number (8679960).

Almost surely, 2^321111345 is an apocalyptic number.

It is an amenable number.

321111345 is a deficient number, since it is larger than the sum of its proper divisors (234406095).

321111345 is a wasteful number, since it uses less digits than its factorization.

321111345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 360, while the sum is 21.

The square root of 321111345 is about 17919.5799336926. The cubic root of 321111345 is about 684.7812859558.

Adding to 321111345 its reverse (543111123), we get a palindrome (864222468).

The spelling of 321111345 in words is "three hundred twenty-one million, one hundred eleven thousand, three hundred forty-five".