1311323133212 has 24 divisors (see below), whose sum is σ = 2343739394304. Its totient is φ = 641684473712.

The previous prime is 1311323133199. The next prime is 1311323133227. The reversal of 1311323133212 is 2123313231131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4805423 + ... + 5070969.

It is an arithmetic number, because the mean of its divisors is an integer number (97655808096).

Almost surely, 2^{1311323133212} is an apocalyptic number.

It is an amenable number.

1311323133212 is a deficient number, since it is larger than the sum of its proper divisors (1032416261092).

1311323133212 is a wasteful number, since it uses less digits than its factorization.

1311323133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291865 (or 291863 counting only the distinct ones).

The product of its digits is 1944, while the sum is 26.

Adding to 1311323133212 its reverse (2123313231131), we get a palindrome (3434636364343).

The spelling of 1311323133212 in words is "one trillion, three hundred eleven billion, three hundred twenty-three million, one hundred thirty-three thousand, two hundred twelve".