42112081447 has 2 divisors, whose sum is σ = 42112081448. Its totient is φ = 42112081446.

The previous prime is 42112081391. The next prime is 42112081469. The reversal of 42112081447 is 74418021124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42112081447 is a prime.

It is a super-2 number, since 2×42112081447² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42112081247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21056040723 + 21056040724.

It is an arithmetic number, because the mean of its divisors is an integer number (21056040724).

Almost surely, 2^42112081447 is an apocalyptic number.

42112081447 is a deficient number, since it is larger than the sum of its proper divisors (1).

42112081447 is an equidigital number, since it uses as much as digits as its factorization.

42112081447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 34.

The spelling of 42112081447 in words is "forty-two billion, one hundred twelve million, eighty-one thousand, four hundred forty-seven".