1121222222209 has 2 divisors, whose sum is σ = 1121222222210. Its totient is φ = 1121222222208.

The previous prime is 1121222222207. The next prime is 1121222222213. The reversal of 1121222222209 is 9022222221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657604221184 + 463618001025 = 810928^2 + 680895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121222222209 - 2¹ = 1121222222207 is a prime.

Together with 1121222222207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1121222222207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560611111104 + 560611111105.

It is an arithmetic number, because the mean of its divisors is an integer number (560611111105).

Almost surely, 2^{1121222222209} is an apocalyptic number.

It is an amenable number.

1121222222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121222222209 is an equidigital number, since it uses as much as digits as its factorization.

1121222222209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

It can be divided in two parts, 1121222 and 222209, that added together give a palindrome (1343431).

The spelling of 1121222222209 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred nine".