1202221121209 has 2 divisors, whose sum is σ = 1202221121210. Its totient is φ = 1202221121208.

The previous prime is 1202221121197. The next prime is 1202221121273. The reversal of 1202221121209 is 9021211222021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144412131984 + 57808989225 = 1069772^2 + 240435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202221121209 - 2²⁷ = 1202086903481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202221121609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601110560604 + 601110560605.

It is an arithmetic number, because the mean of its divisors is an integer number (601110560605).

Almost surely, 2^{1202221121209} is an apocalyptic number.

It is an amenable number.

1202221121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202221121209 is an equidigital number, since it uses as much as digits as its factorization.

1202221121209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 1202221121209 in words is "one trillion, two hundred two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred nine".