11201201011221 has 16 divisors (see below), whose sum is σ = 16084457813760. Its totient is φ = 6892754489280.

The previous prime is 11201201011219. The next prime is 11201201011313. The reversal of 11201201011221 is 12211010210211.

It is a happy number.

It is not a de Polignac number, because 11201201011221 - 2¹ = 11201201011219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11201201011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201201011211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5155965 + ... + 6999026.

It is an arithmetic number, because the mean of its divisors is an integer number (1005278613360).

Almost surely, 2^{11201201011221} is an apocalyptic number.

It is an amenable number.

11201201011221 is a deficient number, since it is larger than the sum of its proper divisors (4883256802539).

11201201011221 is a wasteful number, since it uses less digits than its factorization.

11201201011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12178636.

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

Adding to 11201201011221 its reverse (12211010210211), we get a palindrome (23412211221432).

The spelling of 11201201011221 in words is "eleven trillion, two hundred one billion, two hundred one million, eleven thousand, two hundred twenty-one".