11201220211101 has 4 divisors (see below), whose sum is σ = 14934960281472. Its totient is φ = 7467480140732.

The previous prime is 11201220211067. The next prime is 11201220211123. The reversal of 11201220211101 is 10111202210211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11201220211101 - 2²⁷ = 11201085993373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201220211141) 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, 1866870035181 + ... + 1866870035186.

It is an arithmetic number, because the mean of its divisors is an integer number (3733740070368).

Almost surely, 2^{11201220211101} is an apocalyptic number.

It is an amenable number.

11201220211101 is a deficient number, since it is larger than the sum of its proper divisors (3733740070371).

11201220211101 is an equidigital number, since it uses as much as digits as its factorization.

11201220211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733740070370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11201220211101 its reverse (10111202210211), we get a palindrome (21312422421312).

The spelling of 11201220211101 in words is "eleven trillion, two hundred one billion, two hundred twenty million, two hundred eleven thousand, one hundred one".