42004050121 has 4 divisors (see below), whose sum is σ = 45822600144. Its totient is φ = 38185500100.

The previous prime is 42004050113. The next prime is 42004050133. The reversal of 42004050121 is 12105040024.

42004050121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42004050121 - 2³ = 42004050113 is a prime.

It is a super-2 number, since 2×42004050121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42004050161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909274995 + ... + 1909275016.

It is an arithmetic number, because the mean of its divisors is an integer number (11455650036).

Almost surely, 2^42004050121 is an apocalyptic number.

It is an amenable number.

42004050121 is a deficient number, since it is larger than the sum of its proper divisors (3818550023).

42004050121 is a wasteful number, since it uses less digits than its factorization.

42004050121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818550022.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 42004050121 its reverse (12105040024), we get a palindrome (54109090145).

The spelling of 42004050121 in words is "forty-two billion, four million, fifty thousand, one hundred twenty-one".