1222002109 has 6 divisors (see below), whose sum is σ = 1298113274. Its totient is φ = 1150119360.

The previous prime is 1222002107. The next prime is 1222002137. The reversal of 1222002109 is 9012002221.

It can be written as a sum of positive squares in 3 ways, for example, as 256160025 + 965842084 = 16005^2 + 31078^2 .

It is not a de Polignac number, because 1222002109 - 2¹ = 1222002107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222002107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2113902 + ... + 2114479.

Almost surely, 2^1222002109 is an apocalyptic number.

It is an amenable number.

1222002109 is a deficient number, since it is larger than the sum of its proper divisors (76111165).

1222002109 is an equidigital number, since it uses as much as digits as its factorization.

1222002109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228415 (or 4228398 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1222002109 is about 34957.1467514155. The cubic root of 1222002109 is about 1069.1139224437.

The spelling of 1222002109 in words is "one billion, two hundred twenty-two million, two thousand, one hundred nine".