111433443221 has 2 divisors, whose sum is σ = 111433443222. Its totient is φ = 111433443220.

The previous prime is 111433443161. The next prime is 111433443227. The reversal of 111433443221 is 122344334111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109485544996 + 1947898225 = 330886^2 + 44135^2 .

It is an emirp because it is prime and its reverse (122344334111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111433443221 - 2¹⁸ = 111433181077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111433443227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55716721610 + 55716721611.

It is an arithmetic number, because the mean of its divisors is an integer number (55716721611).

Almost surely, 2^111433443221 is an apocalyptic number.

It is an amenable number.

111433443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111433443221 is an equidigital number, since it uses as much as digits as its factorization.

111433443221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

Adding to 111433443221 its reverse (122344334111), we get a palindrome (233777777332).

The spelling of 111433443221 in words is "one hundred eleven billion, four hundred thirty-three million, four hundred forty-three thousand, two hundred twenty-one".