12012010121 has 16 divisors (see below), whose sum is σ = 12765177600. Its totient is φ = 11271328848.

The previous prime is 12012010117. The next prime is 12012010133. The reversal of 12012010121 is 12101021021.

It is a cyclic number.

It is not a de Polignac number, because 12012010121 - 2² = 12012010117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012010181) 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, 1164830 + ... + 1175096.

It is an arithmetic number, because the mean of its divisors is an integer number (797823600).

Almost surely, 2^12012010121 is an apocalyptic number.

It is an amenable number.

12012010121 is a deficient number, since it is larger than the sum of its proper divisors (753167479).

12012010121 is a wasteful number, since it uses less digits than its factorization.

12012010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10868.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12012010121 its reverse (12101021021), we get a palindrome (24113031142).

The spelling of 12012010121 in words is "twelve billion, twelve million, ten thousand, one hundred twenty-one".