11220450311 has 4 divisors (see below), whose sum is σ = 12823371792. Its totient is φ = 9617528832.

The previous prime is 11220450253. The next prime is 11220450337. The reversal of 11220450311 is 11305402211.

11220450311 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: 11305402211 = 19 ⋅595021169.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220450311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220450391) 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, 801460730 + ... + 801460743.

It is an arithmetic number, because the mean of its divisors is an integer number (3205842948).

Almost surely, 2^11220450311 is an apocalyptic number.

11220450311 is a deficient number, since it is larger than the sum of its proper divisors (1602921481).

11220450311 is an equidigital number, since it uses as much as digits as its factorization.

11220450311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602921480.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 11220450311 its reverse (11305402211), we get a palindrome (22525852522).

The spelling of 11220450311 in words is "eleven billion, two hundred twenty million, four hundred fifty thousand, three hundred eleven".