12121112201 has 8 divisors (see below), whose sum is σ = 13332314208. Its totient is φ = 11019191700.

The previous prime is 12121112197. The next prime is 12121112207. The reversal of 12121112201 is 10221112121.

It is not a de Polignac number, because 12121112201 - 2² = 12121112197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12121112207) 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 7 ways as a sum of consecutive naturals, for example, 4552055 + ... + 4554716.

It is an arithmetic number, because the mean of its divisors is an integer number (1666539276).

Almost surely, 2^12121112201 is an apocalyptic number.

12121112201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12121112201 is a deficient number, since it is larger than the sum of its proper divisors (1211202007).

12121112201 is an frugal number, since it uses more digits than its factorization.

12121112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9106804 (or 9106782 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121112201 its reverse (10221112121), we get a palindrome (22342224322).

The spelling of 12121112201 in words is "twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred one".