2104385821109 has 16 divisors (see below), whose sum is σ = 2472561256704. Its totient is φ = 1765721160000.

The previous prime is 2104385821049. The next prime is 2104385821127. The reversal of 2104385821109 is 9011285834012.

It is a cyclic number.

It is not a de Polignac number, because 2104385821109 - 2⁸ = 2104385820853 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2104385821109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104385821189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472484 + ... + 2105234.

It is an arithmetic number, because the mean of its divisors is an integer number (154535078544).

Almost surely, 2^{2104385821109} is an apocalyptic number.

It is an amenable number.

2104385821109 is a deficient number, since it is larger than the sum of its proper divisors (368175435595).

2104385821109 is a wasteful number, since it uses less digits than its factorization.

2104385821109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641788.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 2104385821109 in words is "two trillion, one hundred four billion, three hundred eighty-five million, eight hundred twenty-one thousand, one hundred nine".