12212111122111 has 4 divisors (see below), whose sum is σ = 12212155317424. Its totient is φ = 12212066926800.

The previous prime is 12212111122093. The next prime is 12212111122121. The reversal of 12212111122111 is 11122111121221.

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 12212111122111 - 2³³ = 12203521187519 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 (12212111122121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21680550 + ... + 22236691.

It is an arithmetic number, because the mean of its divisors is an integer number (3053038829356).

Almost surely, 2^{12212111122111} is an apocalyptic number.

12212111122111 is a deficient number, since it is larger than the sum of its proper divisors (44195313).

12212111122111 is an equidigital number, since it uses as much as digits as its factorization.

12212111122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44195312.

The product of its digits is 32, while the sum is 19.

Adding to 12212111122111 its reverse (11122111121221), we get a palindrome (23334222243332).

The spelling of 12212111122111 in words is "twelve trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".