11221202222081 has 2 divisors, whose sum is σ = 11221202222082. Its totient is φ = 11221202222080.

The previous prime is 11221202222057. The next prime is 11221202222107. The reversal of 11221202222081 is 18022220212211.

It is an a-pointer prime, because the next prime (11221202222107) can be obtained adding 11221202222081 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8876919701056 + 2344282521025 = 2979416^2 + 1531105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221202222081 - 2²⁶ = 11221135113217 is a prime.

It is a super-2 number, since 2×11221202222081² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221202222081.

It is not a weakly prime, because it can be changed into another prime (11221202222051) 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, 5610601111040 + 5610601111041.

It is an arithmetic number, because the mean of its divisors is an integer number (5610601111041).

Almost surely, 2^{11221202222081} is an apocalyptic number.

It is an amenable number.

11221202222081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221202222081 is an equidigital number, since it uses as much as digits as its factorization.

11221202222081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 11221202222081 its reverse (18022220212211), we get a palindrome (29243422434292).

The spelling of 11221202222081 in words is "eleven trillion, two hundred twenty-one billion, two hundred two million, two hundred twenty-two thousand, eighty-one".