1210201209 has 16 divisors (see below), whose sum is σ = 2049018240. Its totient is φ = 691543440.

The previous prime is 1210201199. The next prime is 1210201229. The reversal of 1210201209 is 9021020121.

It is not a de Polignac number, because 1210201209 - 2⁴ = 1210201193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210201191 and 1210201200.

It is not an unprimeable number, because it can be changed into a prime (1210201229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3201402 + ... + 3201779.

It is an arithmetic number, because the mean of its divisors is an integer number (128063640).

Almost surely, 2^1210201209 is an apocalyptic number.

It is an amenable number.

1210201209 is a deficient number, since it is larger than the sum of its proper divisors (838817031).

1210201209 is an equidigital number, since it uses as much as digits as its factorization.

1210201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6403197 (or 6403191 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1210201209 is about 34787.9463176543. The cubic root of 1210201209 is about 1065.6612992672.

The spelling of 1210201209 in words is "one billion, two hundred ten million, two hundred one thousand, two hundred nine".