12110221212 has 24 divisors (see below), whose sum is σ = 29020891536. Its totient is φ = 3927639168.

The previous prime is 12110221171. The next prime is 12110221229. The reversal of 12110221212 is 21212201121.

It is a junction number, because it is equal to n+sod(n) for n = 12110221191 and 12110221200.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13637193 + ... + 13638080.

It is an arithmetic number, because the mean of its divisors is an integer number (1209203814).

Almost surely, 2^12110221212 is an apocalyptic number.

12110221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12110221212 is an abundant number, since it is smaller than the sum of its proper divisors (16910670324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12110221212 is a wasteful number, since it uses less digits than its factorization.

12110221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27275317 (or 27275315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12110221212 its reverse (21212201121), we get a palindrome (33322422333).

The spelling of 12110221212 in words is "twelve billion, one hundred ten million, two hundred twenty-one thousand, two hundred twelve".