1210001200209 has 16 divisors (see below), whose sum is σ = 1792759129600. Its totient is φ = 806593325328.

The previous prime is 1210001200157. The next prime is 1210001200237. The reversal of 1210001200209 is 9020021000121.

It is not a de Polignac number, because 1210001200209 - 2⁹ = 1210001199697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210001200191 and 1210001200200.

It is not an unprimeable number, because it can be changed into a prime (1210001200259) 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, 1759489 + ... + 2348574.

It is an arithmetic number, because the mean of its divisors is an integer number (112047445600).

Almost surely, 2^{1210001200209} is an apocalyptic number.

It is an amenable number.

1210001200209 is a deficient number, since it is larger than the sum of its proper divisors (582757929391).

1210001200209 is a wasteful number, since it uses less digits than its factorization.

1210001200209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118981 (or 4118975 counting only the distinct ones).

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

The spelling of 1210001200209 in words is "one trillion, two hundred ten billion, one million, two hundred thousand, two hundred nine".