11220201211111 has 4 divisors (see below), whose sum is σ = 11220221476312. Its totient is φ = 11220180945912.

The previous prime is 11220201211013. The next prime is 11220201211139. The reversal of 11220201211111 is 11111210202211.

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 11220201211111 - 2³⁹ = 10670445397223 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 (11220201211151) 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, 9278076 + ... + 10417441.

It is an arithmetic number, because the mean of its divisors is an integer number (2805055369078).

Almost surely, 2^{11220201211111} is an apocalyptic number.

11220201211111 is a deficient number, since it is larger than the sum of its proper divisors (20265201).

11220201211111 is an equidigital number, since it uses as much as digits as its factorization.

11220201211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20265200.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11220201211111 its reverse (11111210202211), we get a palindrome (22331411413322).

The spelling of 11220201211111 in words is "eleven trillion, two hundred twenty billion, two hundred one million, two hundred eleven thousand, one hundred eleven".