11102212121081 has 2 divisors, whose sum is σ = 11102212121082. Its totient is φ = 11102212121080.

The previous prime is 11102212121071. The next prime is 11102212121177. The reversal of 11102212121081 is 18012121220111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10258670903056 + 843541218025 = 3202916^2 + 918445^2 .

It is an emirp because it is prime and its reverse (18012121220111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11102212121081 is a prime.

It is a super-2 number, since 2×11102212121081² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11102212121071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551106060540 + 5551106060541.

It is an arithmetic number, because the mean of its divisors is an integer number (5551106060541).

Almost surely, 2^{11102212121081} is an apocalyptic number.

It is an amenable number.

11102212121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11102212121081 is an equidigital number, since it uses as much as digits as its factorization.

11102212121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 23.

Adding to 11102212121081 its reverse (18012121220111), we get a palindrome (29114333341192).

The spelling of 11102212121081 in words is "eleven trillion, one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, eighty-one".