399902102222201 has 2 divisors, whose sum is σ = 399902102222202. Its totient is φ = 399902102222200.

The previous prime is 399902102222167. The next prime is 399902102222237. The reversal of 399902102222201 is 102222201209993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226753874605801 + 173148227616400 = 15058349^2 + 13158580^2 .

It is an emirp because it is prime and its reverse (102222201209993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399902102222201 - 2³⁰ = 399901028480377 is a prime.

It is not a weakly prime, because it can be changed into another prime (399902102222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199951051111100 + 199951051111101.

It is an arithmetic number, because the mean of its divisors is an integer number (199951051111101).

Almost surely, 2^{399902102222201} is an apocalyptic number.

It is an amenable number.

399902102222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

399902102222201 is an equidigital number, since it uses as much as digits as its factorization.

399902102222201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 399902102222201 in words is "three hundred ninety-nine trillion, nine hundred two billion, one hundred two million, two hundred twenty-two thousand, two hundred one".