11213111113 has 4 divisors (see below), whose sum is σ = 11213328148. Its totient is φ = 11212894080.

The previous prime is 11213111101. The next prime is 11213111123. The reversal of 11213111113 is 31111131211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31111131211 = 2551 ⋅12195661.

It can be written as a sum of positive squares in 2 ways, for example, as 8532771129 + 2680339984 = 92373^2 + 51772^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213111113 - 2⁵ = 11213111081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213111123) 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 in 3 ways as a sum of consecutive naturals, for example, 18673 + ... + 150913.

It is an arithmetic number, because the mean of its divisors is an integer number (2803332037).

Almost surely, 2^11213111113 is an apocalyptic number.

It is an amenable number.

11213111113 is a deficient number, since it is larger than the sum of its proper divisors (217035).

11213111113 is an equidigital number, since it uses as much as digits as its factorization.

11213111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217034.

The product of its digits is 18, while the sum is 16.

Adding to 11213111113 its reverse (31111131211), we get a palindrome (42324242324).

The spelling of 11213111113 in words is "eleven billion, two hundred thirteen million, one hundred eleven thousand, one hundred thirteen".