201212010173 has 2 divisors, whose sum is σ = 201212010174. Its totient is φ = 201212010172.

The previous prime is 201212010161. The next prime is 201212010193. The reversal of 201212010173 is 371010212102.

It is an a-pointer prime, because the next prime (201212010193) can be obtained adding 201212010173 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106728316249 + 94483693924 = 326693^2 + 307382^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212010173 - 2²² = 201207815869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212010193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606005086 + 100606005087.

It is an arithmetic number, because the mean of its divisors is an integer number (100606005087).

Almost surely, 2^201212010173 is an apocalyptic number.

It is an amenable number.

201212010173 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212010173 is an equidigital number, since it uses as much as digits as its factorization.

201212010173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 201212010173 its reverse (371010212102), we get a palindrome (572222222275).

The spelling of 201212010173 in words is "two hundred one billion, two hundred twelve million, ten thousand, one hundred seventy-three".