321111442 has 8 divisors (see below), whose sum is σ = 489563532. Its totient is φ = 157923600.

The previous prime is 321111437. The next prime is 321111443. The reversal of 321111442 is 244111123.

It can be written as a sum of positive squares in 2 ways, for example, as 254051721 + 67059721 = 15939^2 + 8189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×321111442² = 206225116366638728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321111443) 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 3 ways as a sum of consecutive naturals, for example, 1315909 + ... + 1316152.

Almost surely, 2^321111442 is an apocalyptic number.

321111442 is a deficient number, since it is larger than the sum of its proper divisors (168452090).

321111442 is a wasteful number, since it uses less digits than its factorization.

321111442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632124.

The product of its digits is 192, while the sum is 19.

The square root of 321111442 is about 17919.5826402291. The cubic root of 321111442 is about 684.7813549078.

Adding to 321111442 its reverse (244111123), we get a palindrome (565222565).

The spelling of 321111442 in words is "three hundred twenty-one million, one hundred eleven thousand, four hundred forty-two".