11211110222281 has 2 divisors, whose sum is σ = 11211110222282. Its totient is φ = 11211110222280.

The previous prime is 11211110222251. The next prime is 11211110222341. The reversal of 11211110222281 is 18222201111211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7753217491600 + 3457892730681 = 2784460^2 + 1859541^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211110222281 - 2¹⁹ = 11211109697993 is a prime.

It is a super-2 number, since 2×11211110222281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211110222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605555111140 + 5605555111141.

It is an arithmetic number, because the mean of its divisors is an integer number (5605555111141).

Almost surely, 2^{11211110222281} is an apocalyptic number.

It is an amenable number.

11211110222281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211110222281 is an equidigital number, since it uses as much as digits as its factorization.

11211110222281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 25.

Adding to 11211110222281 its reverse (18222201111211), we get a palindrome (29433311333492).

The spelling of 11211110222281 in words is "eleven trillion, two hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, two hundred eighty-one".