201042423077 has 2 divisors, whose sum is σ = 201042423078. Its totient is φ = 201042423076.

The previous prime is 201042423073. The next prime is 201042423143. The reversal of 201042423077 is 770324240102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113236288036 + 87806135041 = 336506^2 + 296321^2 .

It is a cyclic number.

It is not a de Polignac number, because 201042423077 - 2² = 201042423073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201042423073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521211538 + 100521211539.

It is an arithmetic number, because the mean of its divisors is an integer number (100521211539).

Almost surely, 2^201042423077 is an apocalyptic number.

It is an amenable number.

201042423077 is a deficient number, since it is larger than the sum of its proper divisors (1).

201042423077 is an equidigital number, since it uses as much as digits as its factorization.

201042423077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

Adding to 201042423077 its reverse (770324240102), we get a palindrome (971366663179).

The spelling of 201042423077 in words is "two hundred one billion, forty-two million, four hundred twenty-three thousand, seventy-seven".