11220457211 has 4 divisors (see below), whose sum is σ = 11224626432. Its totient is φ = 11216287992.

The previous prime is 11220457187. The next prime is 11220457231. The reversal of 11220457211 is 11275402211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11275402211 = 18077 ⋅623743.

It is a cyclic number.

It is not a de Polignac number, because 11220457211 - 2¹⁰ = 11220456187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220457231) 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, 2080571 + ... + 2085956.

It is an arithmetic number, because the mean of its divisors is an integer number (2806156608).

Almost surely, 2^11220457211 is an apocalyptic number.

11220457211 is a deficient number, since it is larger than the sum of its proper divisors (4169221).

11220457211 is an equidigital number, since it uses as much as digits as its factorization.

11220457211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169220.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 11220457211 its reverse (11275402211), we get a palindrome (22495859422).

The spelling of 11220457211 in words is "eleven billion, two hundred twenty million, four hundred fifty-seven thousand, two hundred eleven".