11201122221 has 8 divisors (see below), whose sum is σ = 15338473824. Its totient is φ = 7265592720.

The previous prime is 11201122217. The next prime is 11201122241. The reversal of 11201122221 is 12222110211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11201122221 - 2² = 11201122217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11201122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201122241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50455395 + ... + 50455616.

It is an arithmetic number, because the mean of its divisors is an integer number (1917309228).

Almost surely, 2^11201122221 is an apocalyptic number.

It is an amenable number.

11201122221 is a deficient number, since it is larger than the sum of its proper divisors (4137351603).

11201122221 is a wasteful number, since it uses less digits than its factorization.

11201122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100911051.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11201122221 its reverse (12222110211), we get a palindrome (23423232432).

The spelling of 11201122221 in words is "eleven billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty-one".