11213112311 has 4 divisors (see below), whose sum is σ = 11232022032. Its totient is φ = 11194202592.

The previous prime is 11213112307. The next prime is 11213112343. The reversal of 11213112311 is 11321131211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11213112311 - 2² = 11213112307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11213112311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213112511) 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, 9453971 + ... + 9455156.

It is an arithmetic number, because the mean of its divisors is an integer number (2808005508).

Almost surely, 2^11213112311 is an apocalyptic number.

11213112311 is a deficient number, since it is larger than the sum of its proper divisors (18909721).

11213112311 is an equidigital number, since it uses as much as digits as its factorization.

11213112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18909720.

The product of its digits is 36, while the sum is 17.

Adding to 11213112311 its reverse (11321131211), we get a palindrome (22534243522).

The spelling of 11213112311 in words is "eleven billion, two hundred thirteen million, one hundred twelve thousand, three hundred eleven".