11201100001221 has 64 divisors (see below), whose sum is σ = 16927276713984. Its totient is φ = 6540294758400.

The previous prime is 11201100001219. The next prime is 11201100001237. The reversal of 11201100001221 is 12210000110211.

It is not a de Polignac number, because 11201100001221 - 2¹ = 11201100001219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11201100001197 and 11201100001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201100001621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94839021 + ... + 94957053.

It is an arithmetic number, because the mean of its divisors is an integer number (264488698656).

Almost surely, 2^{11201100001221} is an apocalyptic number.

It is an amenable number.

11201100001221 is a deficient number, since it is larger than the sum of its proper divisors (5726176712763).

11201100001221 is a wasteful number, since it uses less digits than its factorization.

11201100001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119614.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11201100001221 its reverse (12210000110211), we get a palindrome (23411100111432).

The spelling of 11201100001221 in words is "eleven trillion, two hundred one billion, one hundred million, one thousand, two hundred twenty-one".