42078321113 has 2 divisors, whose sum is σ = 42078321114. Its totient is φ = 42078321112.

The previous prime is 42078321091. The next prime is 42078321121. The reversal of 42078321113 is 31112387024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37685680384 + 4392640729 = 194128^2 + 66277^2 .

It is a cyclic number.

It is not a de Polignac number, because 42078321113 - 2⁸ = 42078320857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42078321113.

It is not a weakly prime, because it can be changed into another prime (42078321133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21039160556 + 21039160557.

It is an arithmetic number, because the mean of its divisors is an integer number (21039160557).

Almost surely, 2^42078321113 is an apocalyptic number.

It is an amenable number.

42078321113 is a deficient number, since it is larger than the sum of its proper divisors (1).

42078321113 is an equidigital number, since it uses as much as digits as its factorization.

42078321113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 42078321113 in words is "forty-two billion, seventy-eight million, three hundred twenty-one thousand, one hundred thirteen".