11110221012221 has 2 divisors, whose sum is σ = 11110221012222. Its totient is φ = 11110221012220.

The previous prime is 11110221012197. The next prime is 11110221012239. The reversal of 11110221012221 is 12221012201111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11108982324196 + 1238688025 = 3333014^2 + 35195^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110221012221 - 2¹⁸ = 11110220750077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11110221012221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11110221011221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555110506110 + 5555110506111.

It is an arithmetic number, because the mean of its divisors is an integer number (5555110506111).

Almost surely, 2^{11110221012221} is an apocalyptic number.

It is an amenable number.

11110221012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11110221012221 is an equidigital number, since it uses as much as digits as its factorization.

11110221012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11110221012221 its reverse (12221012201111), we get a palindrome (23331233213332).

The spelling of 11110221012221 in words is "eleven trillion, one hundred ten billion, two hundred twenty-one million, twelve thousand, two hundred twenty-one".