12121201105 has 16 divisors (see below), whose sum is σ = 15768071424. Its totient is φ = 8891755200.

The previous prime is 12121201087. The next prime is 12121201109. The reversal of 12121201105 is 50110212121.

It is not a de Polignac number, because 12121201105 - 2⁹ = 12121200593 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 607669 + ... + 627298.

It is an arithmetic number, because the mean of its divisors is an integer number (985504464).

Almost surely, 2^12121201105 is an apocalyptic number.

It is an amenable number.

12121201105 is a deficient number, since it is larger than the sum of its proper divisors (3646870319).

12121201105 is a wasteful number, since it uses less digits than its factorization.

12121201105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235136.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 12121201105 its reverse (50110212121), we get a palindrome (62231413226).

The spelling of 12121201105 in words is "twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred five".