11220243311 has 4 divisors (see below), whose sum is σ = 11493907824. Its totient is φ = 10946578800.

The previous prime is 11220243301. The next prime is 11220243319. The reversal of 11220243311 is 11334202211.

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 11220243311 - 2⁶ = 11220243247 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 (11220243319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136832195 + ... + 136832276.

It is an arithmetic number, because the mean of its divisors is an integer number (2873476956).

Almost surely, 2^11220243311 is an apocalyptic number.

11220243311 is a deficient number, since it is larger than the sum of its proper divisors (273664513).

11220243311 is an equidigital number, since it uses as much as digits as its factorization.

11220243311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273664512.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11220243311 its reverse (11334202211), we get a palindrome (22554445522).

The spelling of 11220243311 in words is "eleven billion, two hundred twenty million, two hundred forty-three thousand, three hundred eleven".