2112125065509 has 16 divisors (see below), whose sum is σ = 2818043653824. Its totient is φ = 1407145152000.

The previous prime is 2112125065483. The next prime is 2112125065529. The reversal of 2112125065509 is 9055605212112.

It is not a de Polignac number, because 2112125065509 - 2³⁹ = 1562369251621 is a prime.

It is a super-2 number, since 2×2112125065509² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112125065529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45446734 + ... + 45493184.

It is an arithmetic number, because the mean of its divisors is an integer number (176127728364).

Almost surely, 2^{2112125065509} is an apocalyptic number.

It is an amenable number.

2112125065509 is a deficient number, since it is larger than the sum of its proper divisors (705918588315).

2112125065509 is a wasteful number, since it uses less digits than its factorization.

2112125065509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56228.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 2112125065509 in words is "two trillion, one hundred twelve billion, one hundred twenty-five million, sixty-five thousand, five hundred nine".