43121605621875 has 192 divisors, whose sum is σ = 82870295961600. Its totient is φ = 19723964400000.

The previous prime is 43121605621817. The next prime is 43121605621901. The reversal of 43121605621875 is 57812650612134.

It is not a de Polignac number, because 43121605621875 - 2¹⁰ = 43121605620851 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 468244584 + ... + 468336666.

It is an arithmetic number, because the mean of its divisors is an integer number (431616124800).

Almost surely, 2^{43121605621875} is an apocalyptic number.

43121605621875 is a deficient number, since it is larger than the sum of its proper divisors (39748690339725).

43121605621875 is a wasteful number, since it uses less digits than its factorization.

43121605621875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92380 (or 92360 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 43121605621875 in words is "forty-three trillion, one hundred twenty-one billion, six hundred five million, six hundred twenty-one thousand, eight hundred seventy-five".