11201221221011 has 4 divisors (see below), whose sum is σ = 11201232721224. Its totient is φ = 11201209720800.

The previous prime is 11201221221007. The next prime is 11201221221059. The reversal of 11201221221011 is 11012212210211.

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 11201221221011 - 2² = 11201221221007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11201221221811) 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, 4138550 + ... + 6287291.

It is an arithmetic number, because the mean of its divisors is an integer number (2800308180306).

Almost surely, 2^{11201221221011} is an apocalyptic number.

11201221221011 is a deficient number, since it is larger than the sum of its proper divisors (11500213).

11201221221011 is a wasteful number, since it uses less digits than its factorization.

11201221221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11500212.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11201221221011 its reverse (11012212210211), we get a palindrome (22213433431222).

The spelling of 11201221221011 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".