11220010211221 has 6 divisors (see below), whose sum is σ = 13051848613110. Its totient is φ = 9617151609576.

The previous prime is 11220010211213. The next prime is 11220010211239. The reversal of 11220010211221 is 12211201002211.

11220010211221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8236980360196 + 2983029851025 = 2870014^2 + 1727145^2 .

It is not a de Polignac number, because 11220010211221 - 2³ = 11220010211213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220010211195 and 11220010211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220010211261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114489900066 + ... + 114489900163.

It is an arithmetic number, because the mean of its divisors is an integer number (2175308102185).

Almost surely, 2^{11220010211221} is an apocalyptic number.

It is an amenable number.

11220010211221 is a deficient number, since it is larger than the sum of its proper divisors (1831838401889).

11220010211221 is an equidigital number, since it uses as much as digits as its factorization.

11220010211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228979800243 (or 228979800236 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11220010211221 its reverse (12211201002211), we get a palindrome (23431211213432).

The spelling of 11220010211221 in words is "eleven trillion, two hundred twenty billion, ten million, two hundred eleven thousand, two hundred twenty-one".