102209801 has 2 divisors, whose sum is σ = 102209802. Its totient is φ = 102209800.

The previous prime is 102209791. The next prime is 102209881. The reversal of 102209801 is 108902201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100480576 + 1729225 = 10024^2 + 1315^2 .

It is an emirp because it is prime and its reverse (108902201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102209801 - 2¹⁴ = 102193417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102209881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51104900 + 51104901.

It is an arithmetic number, because the mean of its divisors is an integer number (51104901).

Almost surely, 2^102209801 is an apocalyptic number.

It is an amenable number.

102209801 is a deficient number, since it is larger than the sum of its proper divisors (1).

102209801 is an equidigital number, since it uses as much as digits as its factorization.

102209801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 102209801 is about 10109.8863000530. The cubic root of 102209801 is about 467.5529996058.

The spelling of 102209801 in words is "one hundred two million, two hundred nine thousand, eight hundred one".