42043044101 has 2 divisors, whose sum is σ = 42043044102. Its totient is φ = 42043044100.

The previous prime is 42043044079. The next prime is 42043044137. The reversal of 42043044101 is 10144034024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40250791876 + 1792252225 = 200626^2 + 42335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42043044101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42043044191) 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, 21021522050 + 21021522051.

It is an arithmetic number, because the mean of its divisors is an integer number (21021522051).

Almost surely, 2^42043044101 is an apocalyptic number.

It is an amenable number.

42043044101 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043044101 is an equidigital number, since it uses as much as digits as its factorization.

42043044101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42043044101 its reverse (10144034024), we get a palindrome (52187078125).

The spelling of 42043044101 in words is "forty-two billion, forty-three million, forty-four thousand, one hundred one".