12212120122111 has 16 divisors (see below), whose sum is σ = 15914437084224. Its totient is φ = 9093964045824.

The previous prime is 12212120122057. The next prime is 12212120122121. The reversal of 12212120122111 is 11122102121221.

It is a happy number.

It is not a de Polignac number, because 12212120122111 - 2⁷ = 12212120121983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212120122121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3947031460 + ... + 3947034553.

It is an arithmetic number, because the mean of its divisors is an integer number (994652317764).

Almost surely, 2^{12212120122111} is an apocalyptic number.

12212120122111 is a deficient number, since it is larger than the sum of its proper divisors (3702316962113).

12212120122111 is a wasteful number, since it uses less digits than its factorization.

12212120122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894066050.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12212120122111 its reverse (11122102121221), we get a palindrome (23334222243332).

The spelling of 12212120122111 in words is "twelve trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, one hundred eleven".