12121636188373 has 8 divisors (see below), whose sum is σ = 12163318352856. Its totient is φ = 12080011008000.

The previous prime is 12121636188317. The next prime is 12121636188383. The reversal of 12121636188373 is 37388163612121.

It can be written as a sum of positive squares in 4 ways, for example, as 2701690517124 + 9419945671249 = 1643682^2 + 3069193^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12121636188373 - 2⁹ = 12121636187861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121636188373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121636188383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13819836 + ... + 14670757.

It is an arithmetic number, because the mean of its divisors is an integer number (1520414794107).

Almost surely, 2^{12121636188373} is an apocalyptic number.

It is an amenable number.

12121636188373 is a deficient number, since it is larger than the sum of its proper divisors (41682164483).

12121636188373 is a wasteful number, since it uses less digits than its factorization.

12121636188373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28492055.

The product of its digits is 1741824, while the sum is 52.

The spelling of 12121636188373 in words is "twelve trillion, one hundred twenty-one billion, six hundred thirty-six million, one hundred eighty-eight thousand, three hundred seventy-three".