201220073 has 2 divisors, whose sum is σ = 201220074. Its totient is φ = 201220072.

The previous prime is 201220069. The next prime is 201220199. The reversal of 201220073 is 370022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188567824 + 12652249 = 13732^2 + 3557^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220073 - 2² = 201220069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201220043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610036 + 100610037.

It is an arithmetic number, because the mean of its divisors is an integer number (100610037).

Almost surely, 2^201220073 is an apocalyptic number.

It is an amenable number.

201220073 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220073 is an equidigital number, since it uses as much as digits as its factorization.

201220073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 201220073 is about 14185.2061317416. The cubic root of 201220073 is about 585.9903093755.

Adding to 201220073 its reverse (370022102), we get a palindrome (571242175).

The spelling of 201220073 in words is "two hundred one million, two hundred twenty thousand, seventy-three".