1212002289 has 6 divisors (see below), whose sum is σ = 1750669986. Its totient is φ = 808001520.

The previous prime is 1212002269. The next prime is 1212002291. The reversal of 1212002289 is 9822002121.

It can be written as a sum of positive squares in only one way, i.e., 1182190689 + 29811600 = 34383^2 + 5460^2 .

It is not a de Polignac number, because 1212002289 - 2²⁹ = 675131377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212002219) 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, 67333452 + ... + 67333469.

It is an arithmetic number, because the mean of its divisors is an integer number (291778331).

Almost surely, 2^1212002289 is an apocalyptic number.

It is an amenable number.

1212002289 is a deficient number, since it is larger than the sum of its proper divisors (538667697).

1212002289 is a wasteful number, since it uses less digits than its factorization.

1212002289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134666927 (or 134666924 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1212002289 is about 34813.8232459464. The cubic root of 1212002289 is about 1066.1896934639.

The spelling of 1212002289 in words is "one billion, two hundred twelve million, two thousand, two hundred eighty-nine".