1220102209 has 2 divisors, whose sum is σ = 1220102210. Its totient is φ = 1220102208.

The previous prime is 1220102207. The next prime is 1220102237. The reversal of 1220102209 is 9022010221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 802022400 + 418079809 = 28320^2 + 20447^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220102209 - 2¹ = 1220102207 is a prime.

Together with 1220102207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1220102207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610051104 + 610051105.

It is an arithmetic number, because the mean of its divisors is an integer number (610051105).

Almost surely, 2^1220102209 is an apocalyptic number.

It is an amenable number.

1220102209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220102209 is an equidigital number, since it uses as much as digits as its factorization.

1220102209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1220102209 is about 34929.9614800818. The cubic root of 1220102209 is about 1068.5595690301.

The spelling of 1220102209 in words is "one billion, two hundred twenty million, one hundred two thousand, two hundred nine".