1213002209 has 2 divisors, whose sum is σ = 1213002210. Its totient is φ = 1213002208.

The previous prime is 1213002187. The next prime is 1213002239. The reversal of 1213002209 is 9022003121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203881809 + 9120400 = 34697^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213002209 - 2⁸ = 1213001953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213002239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606501104 + 606501105.

It is an arithmetic number, because the mean of its divisors is an integer number (606501105).

Almost surely, 2^1213002209 is an apocalyptic number.

It is an amenable number.

1213002209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213002209 is an equidigital number, since it uses as much as digits as its factorization.

1213002209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1213002209 is about 34828.1812473749. The cubic root of 1213002209 is about 1066.4828203439.

The spelling of 1213002209 in words is "one billion, two hundred thirteen million, two thousand, two hundred nine".