12110122221 has 16 divisors (see below), whose sum is σ = 16525010880. Its totient is φ = 7886510720.

The previous prime is 12110122201. The next prime is 12110122247. The reversal of 12110122221 is 12222101121.

It is a de Polignac number, because none of the positive numbers 2^k-12110122221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12110122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110122201) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 251070 + ... + 295391.

It is an arithmetic number, because the mean of its divisors is an integer number (1032813180).

Almost surely, 2^12110122221 is an apocalyptic number.

It is an amenable number.

12110122221 is a deficient number, since it is larger than the sum of its proper divisors (4414888659).

12110122221 is an equidigital number, since it uses as much as digits as its factorization.

12110122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546636.

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

Adding to 12110122221 its reverse (12222101121), we get a palindrome (24332223342).

The spelling of 12110122221 in words is "twelve billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".