201321073 has 2 divisors, whose sum is σ = 201321074. Its totient is φ = 201321072.

The previous prime is 201321053. The next prime is 201321077. The reversal of 201321073 is 370123102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172344384 + 28976689 = 13128^2 + 5383^2 .

It is a cyclic number.

It is not a de Polignac number, because 201321073 - 2⁵ = 201321041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201321073.

It is not a weakly prime, because it can be changed into another prime (201321077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660536 + 100660537.

It is an arithmetic number, because the mean of its divisors is an integer number (100660537).

Almost surely, 2^201321073 is an apocalyptic number.

It is an amenable number.

201321073 is a deficient number, since it is larger than the sum of its proper divisors (1).

201321073 is an equidigital number, since it uses as much as digits as its factorization.

201321073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 201321073 is about 14188.7657320854. The cubic root of 201321073 is about 586.0883365765.

Adding to 201321073 its reverse (370123102), we get a palindrome (571444175).

The spelling of 201321073 in words is "two hundred one million, three hundred twenty-one thousand, seventy-three".