12120221210111 has 4 divisors (see below), whose sum is σ = 13851681382992. Its totient is φ = 10388761037232.

The previous prime is 12120221210003. The next prime is 12120221210159. The reversal of 12120221210111 is 11101212202121.

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 12120221210111 - 2¹⁰ = 12120221209087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120221210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120221210411) 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 in 3 ways as a sum of consecutive naturals, for example, 865730086430 + ... + 865730086443.

It is an arithmetic number, because the mean of its divisors is an integer number (3462920345748).

Almost surely, 2^{12120221210111} is an apocalyptic number.

12120221210111 is a deficient number, since it is larger than the sum of its proper divisors (1731460172881).

12120221210111 is an equidigital number, since it uses as much as digits as its factorization.

12120221210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731460172880.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12120221210111 its reverse (11101212202121), we get a palindrome (23221433412232).

The spelling of 12120221210111 in words is "twelve trillion, one hundred twenty billion, two hundred twenty-one million, two hundred ten thousand, one hundred eleven".