111212122020211 has 2 divisors, whose sum is σ = 111212122020212. Its totient is φ = 111212122020210.

The previous prime is 111212122020187. The next prime is 111212122020239. The reversal of 111212122020211 is 112020221212111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111212122020211 - 2¹⁷ = 111212121889139 is a prime.

It is not a weakly prime, because it can be changed into another prime (111212122021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606061010105 + 55606061010106.

It is an arithmetic number, because the mean of its divisors is an integer number (55606061010106).

Almost surely, 2^{111212122020211} is an apocalyptic number.

111212122020211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212122020211 is an equidigital number, since it uses as much as digits as its factorization.

111212122020211 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 19.

Adding to 111212122020211 its reverse (112020221212111), we get a palindrome (223232343232322).

The spelling of 111212122020211 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty-two million, twenty thousand, two hundred eleven".