42121404121063 has 2 divisors, whose sum is σ = 42121404121064. Its totient is φ = 42121404121062.

The previous prime is 42121404121033. The next prime is 42121404121151. The reversal of 42121404121063 is 36012140412124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42121404121063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121404121033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060702060531 + 21060702060532.

It is an arithmetic number, because the mean of its divisors is an integer number (21060702060532).

Almost surely, 2^{42121404121063} is an apocalyptic number.

42121404121063 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121404121063 is an equidigital number, since it uses as much as digits as its factorization.

42121404121063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 42121404121063 its reverse (36012140412124), we get a palindrome (78133544533187).

The spelling of 42121404121063 in words is "forty-two trillion, one hundred twenty-one billion, four hundred four million, one hundred twenty-one thousand, sixty-three".