12221220212011 has 16 divisors (see below), whose sum is σ = 12565661760000. Its totient is φ = 11881631845440.

The previous prime is 12221220211909. The next prime is 12221220212087. The reversal of 12221220212011 is 11021202212221.

It is a cyclic number.

It is not a de Polignac number, because 12221220212011 - 2¹¹ = 12221220209963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221220212011.

It is not an unprimeable number, because it can be changed into a prime (12221220213011) 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, 25673976 + ... + 26145658.

It is an arithmetic number, because the mean of its divisors is an integer number (785353860000).

Almost surely, 2^{12221220212011} is an apocalyptic number.

12221220212011 is a deficient number, since it is larger than the sum of its proper divisors (344441547989).

12221220212011 is an equidigital number, since it uses as much as digits as its factorization.

12221220212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476826.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221220212011 its reverse (11021202212221), we get a palindrome (23242422424232).

The spelling of 12221220212011 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, eleven".