12110111011221 has 16 divisors (see below), whose sum is σ = 16158536769600. Its totient is φ = 8067547140480.

The previous prime is 12110111011189. The next prime is 12110111011277. The reversal of 12110111011221 is 12211011101121.

It is not a de Polignac number, because 12110111011221 - 2⁵ = 12110111011189 is a prime.

It is a super-2 number, since 2×12110111011221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12110111011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110111012221) 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 in 15 ways as a sum of consecutive naturals, for example, 61665241 + ... + 61861313.

It is an arithmetic number, because the mean of its divisors is an integer number (1009908548100).

Almost surely, 2^{12110111011221} is an apocalyptic number.

It is an amenable number.

12110111011221 is a deficient number, since it is larger than the sum of its proper divisors (4048425758379).

12110111011221 is a wasteful number, since it uses less digits than its factorization.

12110111011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210916.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12110111011221 its reverse (12211011101121), we get a palindrome (24321122112342).

The spelling of 12110111011221 in words is "twelve trillion, one hundred ten billion, one hundred eleven million, eleven thousand, two hundred twenty-one".