1202200121209 has 2 divisors, whose sum is σ = 1202200121210. Its totient is φ = 1202200121208.

The previous prime is 1202200121173. The next prime is 1202200121231. The reversal of 1202200121209 is 9021210022021.

It is an a-pointer prime, because the next prime (1202200121231) can be obtained adding 1202200121209 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797198979600 + 405001141609 = 892860^2 + 636397^2 .

It is an emirp because it is prime and its reverse (9021210022021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202200121209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202200121209.

It is not a weakly prime, because it can be changed into another prime (1202200121909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601100060604 + 601100060605.

It is an arithmetic number, because the mean of its divisors is an integer number (601100060605).

Almost surely, 2^{1202200121209} is an apocalyptic number.

It is an amenable number.

1202200121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202200121209 is an equidigital number, since it uses as much as digits as its factorization.

1202200121209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 1202200121209 in words is "one trillion, two hundred two billion, two hundred million, one hundred twenty-one thousand, two hundred nine".