521340042107 has 2 divisors, whose sum is σ = 521340042108. Its totient is φ = 521340042106.

The previous prime is 521340042071. The next prime is 521340042163. The reversal of 521340042107 is 701240043125.

Together with previous prime (521340042071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521340042107 - 2⁸ = 521340041851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521340042107.

It is not a weakly prime, because it can be changed into another prime (521340042407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260670021053 + 260670021054.

It is an arithmetic number, because the mean of its divisors is an integer number (260670021054).

Almost surely, 2^521340042107 is an apocalyptic number.

521340042107 is a deficient number, since it is larger than the sum of its proper divisors (1).

521340042107 is an equidigital number, since it uses as much as digits as its factorization.

521340042107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 521340042107 in words is "five hundred twenty-one billion, three hundred forty million, forty-two thousand, one hundred seven".