1311631301212 has 24 divisors (see below), whose sum is σ = 2305396325232. Its totient is φ = 652947859200.

The previous prime is 1311631301179. The next prime is 1311631301213. The reversal of 1311631301212 is 2121031361131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311631301213) 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 7 ways as a sum of consecutive naturals, for example, 4209762 + ... + 4510582.

It is an arithmetic number, because the mean of its divisors is an integer number (96058180218).

Almost surely, 2^{1311631301212} is an apocalyptic number.

It is an amenable number.

1311631301212 is a deficient number, since it is larger than the sum of its proper divisors (993765024020).

1311631301212 is a wasteful number, since it uses less digits than its factorization.

1311631301212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305589 (or 305587 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 1311631301212 its reverse (2121031361131), we get a palindrome (3432662662343).

The spelling of 1311631301212 in words is "one trillion, three hundred eleven billion, six hundred thirty-one million, three hundred one thousand, two hundred twelve".