209189386201 has 2 divisors, whose sum is σ = 209189386202. Its totient is φ = 209189386200.

The previous prime is 209189386199. The next prime is 209189386271. The reversal of 209189386201 is 102683981902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113676865600 + 95512520601 = 337160^2 + 309051^2 .

It is a cyclic number.

It is not a de Polignac number, because 209189386201 - 2¹ = 209189386199 is a prime.

It is a super-2 number, since 2×209189386201² (a number of 23 digits) contains 22 as substring.

Together with 209189386199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (209189386271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104594693100 + 104594693101.

It is an arithmetic number, because the mean of its divisors is an integer number (104594693101).

Almost surely, 2^209189386201 is an apocalyptic number.

It is an amenable number.

209189386201 is a deficient number, since it is larger than the sum of its proper divisors (1).

209189386201 is an equidigital number, since it uses as much as digits as its factorization.

209189386201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 209189386201 in words is "two hundred nine billion, one hundred eighty-nine million, three hundred eighty-six thousand, two hundred one".