11546221111 has 4 divisors (see below), whose sum is σ = 11548137832. Its totient is φ = 11544304392.

The previous prime is 11546220943. The next prime is 11546221123. The reversal of 11546221111 is 11112264511.

It is a happy number.

11546221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112264511 = 139 ⋅79944349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11546221111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11546221171) 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 in 3 ways as a sum of consecutive naturals, for example, 949296 + ... + 961381.

It is an arithmetic number, because the mean of its divisors is an integer number (2887034458).

Almost surely, 2^11546221111 is an apocalyptic number.

11546221111 is a deficient number, since it is larger than the sum of its proper divisors (1916721).

11546221111 is an equidigital number, since it uses as much as digits as its factorization.

11546221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916720.

The product of its digits is 480, while the sum is 25.

Adding to 11546221111 its reverse (11112264511), we get a palindrome (22658485622).

The spelling of 11546221111 in words is "eleven billion, five hundred forty-six million, two hundred twenty-one thousand, one hundred eleven".