111222102121211 has 2 divisors, whose sum is σ = 111222102121212. Its totient is φ = 111222102121210.

The previous prime is 111222102121121. The next prime is 111222102121219. The reversal of 111222102121211 is 112121201222111.

It is a happy number.

Together with previous prime (111222102121121) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222102121211 is a prime.

It is a super-2 number, since 2×111222102121211² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111222102121219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611051060605 + 55611051060606.

It is an arithmetic number, because the mean of its divisors is an integer number (55611051060606).

Almost surely, 2^{111222102121211} is an apocalyptic number.

111222102121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222102121211 is an equidigital number, since it uses as much as digits as its factorization.

111222102121211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111222102121211 its reverse (112121201222111), we get a palindrome (223343303343322).

The spelling of 111222102121211 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred two million, one hundred twenty-one thousand, two hundred eleven".