12121201108 has 12 divisors (see below), whose sum is σ = 21943553940. Its totient is φ = 5851614272.

The previous prime is 12121201087. The next prime is 12121201109. The reversal of 12121201108 is 80110212121.

It can be written as a sum of positive squares in 2 ways, for example, as 6866111044 + 5255090064 = 82862^2 + 72492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121201109) 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 3 ways as a sum of consecutive naturals, for example, 52246441 + ... + 52246672.

It is an arithmetic number, because the mean of its divisors is an integer number (1828629495).

Almost surely, 2^12121201108 is an apocalyptic number.

It is an amenable number.

12121201108 is a deficient number, since it is larger than the sum of its proper divisors (9822352832).

12121201108 is a wasteful number, since it uses less digits than its factorization.

12121201108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104493146 (or 104493144 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121201108 its reverse (80110212121), we get a palindrome (92231413229).

The spelling of 12121201108 in words is "twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred eight".