12212212220111 has 4 divisors (see below), whose sum is σ = 12606154549824. Its totient is φ = 11818269890400.

The previous prime is 12212212220083. The next prime is 12212212220113. The reversal of 12212212220111 is 11102221221221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12212212220111 - 2¹⁰ = 12212212219087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212212220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196971164810 + ... + 196971164871.

It is an arithmetic number, because the mean of its divisors is an integer number (3151538637456).

Almost surely, 2^{12212212220111} is an apocalyptic number.

12212212220111 is a deficient number, since it is larger than the sum of its proper divisors (393942329713).

12212212220111 is an equidigital number, since it uses as much as digits as its factorization.

12212212220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393942329712.

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

Adding to 12212212220111 its reverse (11102221221221), we get a palindrome (23314433441332).

It can be divided in two parts, 122122122 and 20111, that multiplied together give a palindrome (2455997995542).

The spelling of 12212212220111 in words is "twelve trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty thousand, one hundred eleven".