1111021011209 has 2 divisors, whose sum is σ = 1111021011210. Its totient is φ = 1111021011208.

The previous prime is 1111021011169. The next prime is 1111021011239. The reversal of 1111021011209 is 9021101201111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980638633984 + 130382377225 = 990272^2 + 361085^2 .

It is an emirp because it is prime and its reverse (9021101201111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111021011209 - 2⁴⁰ = 11509383433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111021011239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555510505604 + 555510505605.

It is an arithmetic number, because the mean of its divisors is an integer number (555510505605).

Almost surely, 2^{1111021011209} is an apocalyptic number.

It is an amenable number.

1111021011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111021011209 is an equidigital number, since it uses as much as digits as its factorization.

1111021011209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 1111021011209 in words is "one trillion, one hundred eleven billion, twenty-one million, eleven thousand, two hundred nine".