1212201120965 has 4 divisors (see below), whose sum is σ = 1454641345164. Its totient is φ = 969760896768.

The previous prime is 1212201120929. The next prime is 1212201120967. The reversal of 1212201120965 is 5690211022121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 642897672481 + 569303448484 = 801809^2 + 754522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212201120965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212201120967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121220112092 + ... + 121220112101.

It is an arithmetic number, because the mean of its divisors is an integer number (363660336291).

Almost surely, 2^{1212201120965} is an apocalyptic number.

It is an amenable number.

1212201120965 is a deficient number, since it is larger than the sum of its proper divisors (242440224199).

1212201120965 is an equidigital number, since it uses as much as digits as its factorization.

1212201120965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242440224198.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 1212201120965 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred twenty thousand, nine hundred sixty-five".