1212210201209 has 8 divisors (see below), whose sum is σ = 1385389864128. Its totient is φ = 1039032232560.

The previous prime is 1212210201203. The next prime is 1212210201253. The reversal of 1212210201209 is 9021020122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1212210201209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212210201203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161019 + ... + 2663535.

It is an arithmetic number, because the mean of its divisors is an integer number (173173733016).

Almost surely, 2^{1212210201209} is an apocalyptic number.

It is an amenable number.

1212210201209 is a deficient number, since it is larger than the sum of its proper divisors (173179662919).

1212210201209 is an equidigital number, since it uses as much as digits as its factorization.

1212210201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847135.

The product of its (nonzero) digits is 288, while the sum is 23.

It can be divided in two parts, 12 and 12210201209, that added together give a palindrome (12210201221).

The spelling of 1212210201209 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred one thousand, two hundred nine".