2201021209 has 2 divisors, whose sum is σ = 2201021210. Its totient is φ = 2201021208.

The previous prime is 2201021201. The next prime is 2201021227. The reversal of 2201021209 is 9021201022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2081184400 + 119836809 = 45620^2 + 10947^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201021209 - 2³ = 2201021201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2201021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100510604 + 1100510605.

It is an arithmetic number, because the mean of its divisors is an integer number (1100510605).

Almost surely, 2^2201021209 is an apocalyptic number.

It is an amenable number.

2201021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201021209 is an equidigital number, since it uses as much as digits as its factorization.

2201021209 is an evil number, because the sum of its binary digits is even.

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

The square root of 2201021209 is about 46915.0424597485. The cubic root of 2201021209 is about 1300.7926544631.

The spelling of 2201021209 in words is "two billion, two hundred one million, twenty-one thousand, two hundred nine".