111222002081 has 2 divisors, whose sum is σ = 111222002082. Its totient is φ = 111222002080.

The previous prime is 111222002033. The next prime is 111222002107. The reversal of 111222002081 is 180200222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108438490000 + 2783512081 = 329300^2 + 52759^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222002081 - 2¹⁰ = 111222001057 is a prime.

It is a super-2 number, since 2×111222002081² (a number of 23 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 (111222002581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611001040 + 55611001041.

It is an arithmetic number, because the mean of its divisors is an integer number (55611001041).

Almost surely, 2^111222002081 is an apocalyptic number.

It is an amenable number.

111222002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222002081 is an equidigital number, since it uses as much as digits as its factorization.

111222002081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111222002081 its reverse (180200222111), we get a palindrome (291422224192).

The spelling of 111222002081 in words is "one hundred eleven billion, two hundred twenty-two million, two thousand, eighty-one".