201038218009 has 2 divisors, whose sum is σ = 201038218010. Its totient is φ = 201038218008.

The previous prime is 201038217967. The next prime is 201038218019. The reversal of 201038218009 is 900812830102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127395455625 + 73642762384 = 356925^2 + 271372^2 .

It is a cyclic number.

It is not a de Polignac number, because 201038218009 - 2⁷ = 201038217881 is a prime.

It is not a weakly prime, because it can be changed into another prime (201038218019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100519109004 + 100519109005.

It is an arithmetic number, because the mean of its divisors is an integer number (100519109005).

Almost surely, 2^201038218009 is an apocalyptic number.

It is an amenable number.

201038218009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201038218009 is an equidigital number, since it uses as much as digits as its factorization.

201038218009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 201038218009 in words is "two hundred one billion, thirty-eight million, two hundred eighteen thousand, nine".