11102222111221 has 2 divisors, whose sum is σ = 11102222111222. Its totient is φ = 11102222111220.

The previous prime is 11102222111207. The next prime is 11102222111297. The reversal of 11102222111221 is 12211122220111.

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., 10531160780625 + 571061330596 = 3245175^2 + 755686^2 .

It is a cyclic number.

It is not a de Polignac number, because 11102222111221 - 2²⁹ = 11101685240309 is a prime.

It is a super-2 number, since 2×11102222111221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11102222171221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551111055610 + 5551111055611.

It is an arithmetic number, because the mean of its divisors is an integer number (5551111055611).

Almost surely, 2^{11102222111221} is an apocalyptic number.

It is an amenable number.

11102222111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11102222111221 is an equidigital number, since it uses as much as digits as its factorization.

11102222111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11102222111221 its reverse (12211122220111), we get a palindrome (23313344331332).

The spelling of 11102222111221 in words is "eleven trillion, one hundred two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".