1311203013211 has 16 divisors (see below), whose sum is σ = 1616298175744. Its totient is φ = 1035821875104.

The previous prime is 1311203013181. The next prime is 1311203013277. The reversal of 1311203013211 is 1123103021131.

It is a cyclic number.

It is not a de Polignac number, because 1311203013211 - 2⁷ = 1311203013083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311203010211) 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 15 ways as a sum of consecutive naturals, for example, 11145861 + ... + 11262886.

It is an arithmetic number, because the mean of its divisors is an integer number (101018635984).

Almost surely, 2^{1311203013211} is an apocalyptic number.

1311203013211 is a deficient number, since it is larger than the sum of its proper divisors (305095162533).

1311203013211 is a wasteful number, since it uses less digits than its factorization.

1311203013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22409410.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311203013211 its reverse (1123103021131), we get a palindrome (2434306034342).

The spelling of 1311203013211 in words is "one trillion, three hundred eleven billion, two hundred three million, thirteen thousand, two hundred eleven".