501738742121 has 4 divisors (see below), whose sum is σ = 501762979200. Its totient is φ = 501714505044.

The previous prime is 501738742111. The next prime is 501738742147. The reversal of 501738742121 is 121247837105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501738742121 - 2³⁸ = 226860835177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501738742111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12087461 + ... + 12128898.

It is an arithmetic number, because the mean of its divisors is an integer number (125440744800).

Almost surely, 2^501738742121 is an apocalyptic number.

It is an amenable number.

501738742121 is a deficient number, since it is larger than the sum of its proper divisors (24237079).

501738742121 is a wasteful number, since it uses less digits than its factorization.

501738742121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24237078.

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 501738742121 in words is "five hundred one billion, seven hundred thirty-eight million, seven hundred forty-two thousand, one hundred twenty-one".