1212311211303 has 8 divisors (see below), whose sum is σ = 1639181356416. Its totient is φ = 796824270200.

The previous prime is 1212311211271. The next prime is 1212311211337. The reversal of 1212311211303 is 3031121132121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212311211303 - 2⁵ = 1212311211271 is a prime.

It is a super-2 number, since 2×1212311211303² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212311211303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212311211203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2845800753 + ... + 2845801178.

It is an arithmetic number, because the mean of its divisors is an integer number (204897669552).

Almost surely, 2^{1212311211303} is an apocalyptic number.

1212311211303 is a deficient number, since it is larger than the sum of its proper divisors (426870145113).

1212311211303 is an equidigital number, since it uses as much as digits as its factorization.

1212311211303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691602005.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1212311211303 its reverse (3031121132121), we get a palindrome (4243432343424).

The spelling of 1212311211303 in words is "one trillion, two hundred twelve billion, three hundred eleven million, two hundred eleven thousand, three hundred three".