201042021073 has 2 divisors, whose sum is σ = 201042021074. Its totient is φ = 201042021072.

The previous prime is 201042021049. The next prime is 201042021101. The reversal of 201042021073 is 370120240102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195353392144 + 5688628929 = 441988^2 + 75423^2 .

It is a cyclic number.

It is not a de Polignac number, because 201042021073 - 2³³ = 192452086481 is a prime.

It is not a weakly prime, because it can be changed into another prime (201042021043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521010536 + 100521010537.

It is an arithmetic number, because the mean of its divisors is an integer number (100521010537).

Almost surely, 2^201042021073 is an apocalyptic number.

It is an amenable number.

201042021073 is a deficient number, since it is larger than the sum of its proper divisors (1).

201042021073 is an equidigital number, since it uses as much as digits as its factorization.

201042021073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 201042021073 its reverse (370120240102), we get a palindrome (571162261175).

The spelling of 201042021073 in words is "two hundred one billion, forty-two million, twenty-one thousand, seventy-three".