111001001221211 has 2 divisors, whose sum is σ = 111001001221212. Its totient is φ = 111001001221210.

The previous prime is 111001001221153. The next prime is 111001001221213. The reversal of 111001001221211 is 112122100100111.

It is a strong prime.

It is an emirp because it is prime and its reverse (112122100100111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111001001221211 - 2³⁸ = 110726123314267 is a prime.

It is a super-2 number, since 2×111001001221211² (a number of 29 digits) contains 22 as substring.

Together with 111001001221213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111001001221213) 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, 55500500610605 + 55500500610606.

It is an arithmetic number, because the mean of its divisors is an integer number (55500500610606).

Almost surely, 2^{111001001221211} is an apocalyptic number.

111001001221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001001221211 is an equidigital number, since it uses as much as digits as its factorization.

111001001221211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111001001221211 its reverse (112122100100111), we get a palindrome (223123101321322).

The spelling of 111001001221211 in words is "one hundred eleven trillion, one billion, one million, two hundred twenty-one thousand, two hundred eleven".