1121222209 has 2 divisors, whose sum is σ = 1121222210. Its totient is φ = 1121222208.

The previous prime is 1121222197. The next prime is 1121222213. The reversal of 1121222209 is 9022221211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069093809 + 52128400 = 32697^2 + 7220^2 .

It is an emirp because it is prime and its reverse (9022221211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121222209 - 2²¹ = 1119125057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121222209.

It is not a weakly prime, because it can be changed into another prime (1121222269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560611104 + 560611105.

It is an arithmetic number, because the mean of its divisors is an integer number (560611105).

Almost surely, 2^1121222209 is an apocalyptic number.

It is an amenable number.

1121222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121222209 is an equidigital number, since it uses as much as digits as its factorization.

1121222209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1121222209 is about 33484.6563219633. The cubic root of 1121222209 is about 1038.8764397710.

The spelling of 1121222209 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred nine".