11220111021211 has 2 divisors, whose sum is σ = 11220111021212. Its totient is φ = 11220111021210.

The previous prime is 11220111021199. The next prime is 11220111021239. The reversal of 11220111021211 is 11212011102211.

11220111021211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11220111021211 - 2¹³ = 11220111013019 is a prime.

It is not a weakly prime, because it can be changed into another prime (11220115021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610055510605 + 5610055510606.

It is an arithmetic number, because the mean of its divisors is an integer number (5610055510606).

Almost surely, 2^{11220111021211} is an apocalyptic number.

11220111021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220111021211 is an equidigital number, since it uses as much as digits as its factorization.

11220111021211 is an evil number, because the sum of its binary digits is even.

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

Adding to 11220111021211 its reverse (11212011102211), we get a palindrome (22432122123422).

The spelling of 11220111021211 in words is "eleven trillion, two hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred eleven".