42120321343 has 2 divisors, whose sum is σ = 42120321344. Its totient is φ = 42120321342.

The previous prime is 42120321311. The next prime is 42120321407. The reversal of 42120321343 is 34312302124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42120321343 - 2⁵ = 42120321311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42120321743) 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, 21060160671 + 21060160672.

It is an arithmetic number, because the mean of its divisors is an integer number (21060160672).

Almost surely, 2^42120321343 is an apocalyptic number.

42120321343 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120321343 is an equidigital number, since it uses as much as digits as its factorization.

42120321343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42120321343 its reverse (34312302124), we get a palindrome (76432623467).

The spelling of 42120321343 in words is "forty-two billion, one hundred twenty million, three hundred twenty-one thousand, three hundred forty-three".