42005030121 has 24 divisors (see below), whose sum is σ = 63908156000. Its totient is φ = 26512520832.

The previous prime is 42005030113. The next prime is 42005030161. The reversal of 42005030121 is 12103050024.

42005030121 is a `hidden beast` number, since 42 + 0 + 0 + 503 + 0 + 121 = 666.

It is not a de Polignac number, because 42005030121 - 2³ = 42005030113 is a prime.

It is a super-2 number, since 2×42005030121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42005030094 and 42005030103.

It is not an unprimeable number, because it can be changed into a prime (42005030161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192225 + ... + 347793.

Almost surely, 2^42005030121 is an apocalyptic number.

It is an amenable number.

42005030121 is a deficient number, since it is larger than the sum of its proper divisors (21903125879).

42005030121 is a wasteful number, since it uses less digits than its factorization.

42005030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157173 (or 157170 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 42005030121 its reverse (12103050024), we get a palindrome (54108080145).

The spelling of 42005030121 in words is "forty-two billion, five million, thirty thousand, one hundred twenty-one".