42350644121 has 6 divisors (see below), whose sum is σ = 43164792510. Its totient is φ = 41551572608.

The previous prime is 42350644109. The next prime is 42350644123. The reversal of 42350644121 is 12144605324.

It can be written as a sum of positive squares in 3 ways, for example, as 3948362896 + 38402281225 = 62836^2 + 195965^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42350644121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42350644123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7535576 + ... + 7541193.

It is an arithmetic number, because the mean of its divisors is an integer number (7194132085).

Almost surely, 2^42350644121 is an apocalyptic number.

It is an amenable number.

42350644121 is a deficient number, since it is larger than the sum of its proper divisors (814148389).

42350644121 is an equidigital number, since it uses as much as digits as its factorization.

42350644121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076875 (or 15076822 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 42350644121 in words is "forty-two billion, three hundred fifty million, six hundred forty-four thousand, one hundred twenty-one".