42047121266071 has 2 divisors, whose sum is σ = 42047121266072. Its totient is φ = 42047121266070.

The previous prime is 42047121266069. The next prime is 42047121266173. The reversal of 42047121266071 is 17066212174024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42047121266071 - 2¹ = 42047121266069 is a prime.

Together with 42047121266069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42047121266011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023560633035 + 21023560633036.

It is an arithmetic number, because the mean of its divisors is an integer number (21023560633036).

Almost surely, 2^{42047121266071} is an apocalyptic number.

42047121266071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42047121266071 is an equidigital number, since it uses as much as digits as its factorization.

42047121266071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 42047121266071 in words is "forty-two trillion, forty-seven billion, one hundred twenty-one million, two hundred sixty-six thousand, seventy-one".