11321020111 has 2 divisors, whose sum is σ = 11321020112. Its totient is φ = 11321020110.

The previous prime is 11321020099. The next prime is 11321020133. The reversal of 11321020111 is 11102012311.

It is a happy number.

11321020111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11321020111 - 2⁹ = 11321019599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11321020091 and 11321020100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321020811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660510055 + 5660510056.

It is an arithmetic number, because the mean of its divisors is an integer number (5660510056).

Almost surely, 2^11321020111 is an apocalyptic number.

11321020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321020111 is an equidigital number, since it uses as much as digits as its factorization.

11321020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11321020111 its reverse (11102012311), we get a palindrome (22423032422).

The spelling of 11321020111 in words is "eleven billion, three hundred twenty-one million, twenty thousand, one hundred eleven".