42003304121 has 2 divisors, whose sum is σ = 42003304122. Its totient is φ = 42003304120.

The previous prime is 42003304111. The next prime is 42003304141. The reversal of 42003304121 is 12140330024.

It is an a-pointer prime, because the next prime (42003304141) can be obtained adding 42003304121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40586534521 + 1416769600 = 201461^2 + 37640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42003304121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42003304093 and 42003304102.

It is not a weakly prime, because it can be changed into another prime (42003304111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21001652060 + 21001652061.

It is an arithmetic number, because the mean of its divisors is an integer number (21001652061).

Almost surely, 2^42003304121 is an apocalyptic number.

It is an amenable number.

42003304121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42003304121 is an equidigital number, since it uses as much as digits as its factorization.

42003304121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 42003304121 its reverse (12140330024), we get a palindrome (54143634145).

The spelling of 42003304121 in words is "forty-two billion, three million, three hundred four thousand, one hundred twenty-one".