201213232312009 has 2 divisors, whose sum is σ = 201213232312010. Its totient is φ = 201213232312008.

The previous prime is 201213232311979. The next prime is 201213232312093. The reversal of 201213232312009 is 900213232312102.

201213232312009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117358828899984 + 83854403412025 = 10833228^2 + 9157205^2 .

It is a cyclic number.

It is not a de Polignac number, because 201213232312009 - 2²⁵ = 201213198757577 is a prime.

It is not a weakly prime, because it can be changed into another prime (201213232319009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606616156004 + 100606616156005.

It is an arithmetic number, because the mean of its divisors is an integer number (100606616156005).

Almost surely, 2^{201213232312009} is an apocalyptic number.

It is an amenable number.

201213232312009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201213232312009 is an equidigital number, since it uses as much as digits as its factorization.

201213232312009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 201213232312009 in words is "two hundred one trillion, two hundred thirteen billion, two hundred thirty-two million, three hundred twelve thousand, nine".