1121112021209 has 2 divisors, whose sum is σ = 1121112021210. Its totient is φ = 1121112021208.

The previous prime is 1121112021193. The next prime is 1121112021221. The reversal of 1121112021209 is 9021202111211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887439361600 + 233672659609 = 942040^2 + 483397^2 .

It is an emirp because it is prime and its reverse (9021202111211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121112021209 - 2⁴ = 1121112021193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121112021109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560556010604 + 560556010605.

It is an arithmetic number, because the mean of its divisors is an integer number (560556010605).

Almost surely, 2^{1121112021209} is an apocalyptic number.

It is an amenable number.

1121112021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121112021209 is an equidigital number, since it uses as much as digits as its factorization.

1121112021209 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 23.

The spelling of 1121112021209 in words is "one trillion, one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, two hundred nine".