111442321 has 2 divisors, whose sum is σ = 111442322. Its totient is φ = 111442320.

The previous prime is 111442313. The next prime is 111442333. The reversal of 111442321 is 123244111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 47761921 = 7980^2 + 6911^2 .

It is a cyclic number.

It is not a de Polignac number, because 111442321 - 2³ = 111442313 is a prime.

It is not a weakly prime, because it can be changed into another prime (111442351) 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 as a sum of consecutive naturals, namely, 55721160 + 55721161.

It is an arithmetic number, because the mean of its divisors is an integer number (55721161).

Almost surely, 2^111442321 is an apocalyptic number.

It is an amenable number.

111442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111442321 is an equidigital number, since it uses as much as digits as its factorization.

111442321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 111442321 is about 10556.6245078623. The cubic root of 111442321 is about 481.2270702293.

Adding to 111442321 its reverse (123244111), we get a palindrome (234686432).

The spelling of 111442321 in words is "one hundred eleven million, four hundred forty-two thousand, three hundred twenty-one".