42343034021 has 2 divisors, whose sum is σ = 42343034022. Its totient is φ = 42343034020.

The previous prime is 42343034011. The next prime is 42343034051. The reversal of 42343034021 is 12043034324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33182629921 + 9160404100 = 182161^2 + 95710^2 .

It is a cyclic number.

It is not a de Polignac number, because 42343034021 - 2¹⁰ = 42343032997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42343034011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171517010 + 21171517011.

It is an arithmetic number, because the mean of its divisors is an integer number (21171517011).

Almost surely, 2^42343034021 is an apocalyptic number.

It is an amenable number.

42343034021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343034021 is an equidigital number, since it uses as much as digits as its factorization.

42343034021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 42343034021 its reverse (12043034324), we get a palindrome (54386068345).

It can be divided in two parts, 4234303 and 4021, that added together give a palindrome (4238324).

The spelling of 42343034021 in words is "forty-two billion, three hundred forty-three million, thirty-four thousand, twenty-one".