12121044013 has 8 divisors (see below), whose sum is σ = 13821281208. Its totient is φ = 10530499584.

The previous prime is 12121043983. The next prime is 12121044029. The reversal of 12121044013 is 31044012121.

12121044013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 421809444 + 11699234569 = 20538^2 + 108163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12121044013 - 2²⁹ = 11584173101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121042013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27422956 + ... + 27423397.

It is an arithmetic number, because the mean of its divisors is an integer number (1727660151).

Almost surely, 2^12121044013 is an apocalyptic number.

12121044013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12121044013 is a deficient number, since it is larger than the sum of its proper divisors (1700237195).

12121044013 is a wasteful number, since it uses less digits than its factorization.

12121044013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54846383.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12121044013 its reverse (31044012121), we get a palindrome (43165056134).

The spelling of 12121044013 in words is "twelve billion, one hundred twenty-one million, forty-four thousand, thirteen".