11111230321 has 2 divisors, whose sum is σ = 11111230322. Its totient is φ = 11111230320.

The previous prime is 11111230307. The next prime is 11111230331. The reversal of 11111230321 is 12303211111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5846131600 + 5265098721 = 76460^2 + 72561^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111230321 - 2⁵ = 11111230289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111230295 and 11111230304.

It is not a weakly prime, because it can be changed into another prime (11111230331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555615160 + 5555615161.

It is an arithmetic number, because the mean of its divisors is an integer number (5555615161).

Almost surely, 2^11111230321 is an apocalyptic number.

It is an amenable number.

11111230321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111230321 is an equidigital number, since it uses as much as digits as its factorization.

11111230321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11111230321 its reverse (12303211111), we get a palindrome (23414441432).

It can be divided in two parts, 1111 and 1230321, that multiplied together give a palindrome (1366886631).

The spelling of 11111230321 in words is "eleven billion, one hundred eleven million, two hundred thirty thousand, three hundred twenty-one".