42421320329 has 2 divisors, whose sum is σ = 42421320330. Its totient is φ = 42421320328.

The previous prime is 42421320299. The next prime is 42421320371. The reversal of 42421320329 is 92302312424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39140665600 + 3280654729 = 197840^2 + 57277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42421320329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42421320295 and 42421320304.

It is not a weakly prime, because it can be changed into another prime (42421322329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210660164 + 21210660165.

It is an arithmetic number, because the mean of its divisors is an integer number (21210660165).

Almost surely, 2^42421320329 is an apocalyptic number.

It is an amenable number.

42421320329 is a deficient number, since it is larger than the sum of its proper divisors (1).

42421320329 is an equidigital number, since it uses as much as digits as its factorization.

42421320329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 42421320329 in words is "forty-two billion, four hundred twenty-one million, three hundred twenty thousand, three hundred twenty-nine".