42130421321 has 12 divisors (see below), whose sum is σ = 44530294020. Its totient is φ = 39812105760.

The previous prime is 42130421303. The next prime is 42130421323. The reversal of 42130421321 is 12312403124.

It can be written as a sum of positive squares in 2 ways, for example, as 29268366400 + 12862054921 = 171080^2 + 113411^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42130421321 is a prime.

It is a super-3 number, since 3×42130421321³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42130421323) 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 11 ways as a sum of consecutive naturals, for example, 264770 + ... + 392891.

It is an arithmetic number, because the mean of its divisors is an integer number (3710857835).

Almost surely, 2^42130421321 is an apocalyptic number.

It is an amenable number.

42130421321 is a deficient number, since it is larger than the sum of its proper divisors (2399872699).

42130421321 is an equidigital number, since it uses as much as digits as its factorization.

42130421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657784 (or 657737 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 42130421321 its reverse (12312403124), we get a palindrome (54442824445).

The spelling of 42130421321 in words is "forty-two billion, one hundred thirty million, four hundred twenty-one thousand, three hundred twenty-one".