42130024121 has 4 divisors (see below), whose sum is σ = 44608260852. Its totient is φ = 39651787392.

The previous prime is 42130024099. The next prime is 42130024133. The reversal of 42130024121 is 12142003124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38498756521 + 3631267600 = 196211^2 + 60260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42130024121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42130024093 and 42130024102.

It is not an unprimeable number, because it can be changed into a prime (42130024151) 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 3 ways as a sum of consecutive naturals, for example, 1239118340 + ... + 1239118373.

It is an arithmetic number, because the mean of its divisors is an integer number (11152065213).

Almost surely, 2^42130024121 is an apocalyptic number.

It is an amenable number.

42130024121 is a deficient number, since it is larger than the sum of its proper divisors (2478236731).

42130024121 is a wasteful number, since it uses less digits than its factorization.

42130024121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478236730.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42130024121 its reverse (12142003124), we get a palindrome (54272027245).

The spelling of 42130024121 in words is "forty-two billion, one hundred thirty million, twenty-four thousand, one hundred twenty-one".