1212101200208 has 20 divisors (see below), whose sum is σ = 2350023318420. Its totient is φ = 605643569664.

The previous prime is 1212101200207. The next prime is 1212101200237. The reversal of 1212101200208 is 8020021012121.

It can be written as a sum of positive squares in 2 ways, for example, as 398302356544 + 813798843664 = 631112^2 + 902108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212101200208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101200207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25414835 + ... + 25462482.

It is an arithmetic number, because the mean of its divisors is an integer number (117501165921).

Almost surely, 2^{1212101200208} is an apocalyptic number.

It is an amenable number.

1212101200208 is a deficient number, since it is larger than the sum of its proper divisors (1137922118212).

1212101200208 is a wasteful number, since it uses less digits than its factorization.

1212101200208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50878814 (or 50878808 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1212101200208 its reverse (8020021012121), we get a palindrome (9232122212329).

The spelling of 1212101200208 in words is "one trillion, two hundred twelve billion, one hundred one million, two hundred thousand, two hundred eight".