1121202021209 has 2 divisors, whose sum is σ = 1121202021210. Its totient is φ = 1121202021208.

The previous prime is 1121202021197. The next prime is 1121202021229. The reversal of 1121202021209 is 9021202021211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1117731043984 + 3470977225 = 1057228^2 + 58915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121202021209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1121202021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560601010604 + 560601010605.

It is an arithmetic number, because the mean of its divisors is an integer number (560601010605).

Almost surely, 2^{1121202021209} is an apocalyptic number.

It is an amenable number.

1121202021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121202021209 is an equidigital number, since it uses as much as digits as its factorization.

1121202021209 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 23.

The spelling of 1121202021209 in words is "one trillion, one hundred twenty-one billion, two hundred two million, twenty-one thousand, two hundred nine".