1311252236512 has 24 divisors (see below), whose sum is σ = 2581553537136. Its totient is φ = 655619592192.

The previous prime is 1311252236429. The next prime is 1311252236519. The reversal of 1311252236512 is 2156322521131.

It is a super-2 number, since 2×1311252236512² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311252236519) 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 3 ways as a sum of consecutive naturals, for example, 5618208 + ... + 5846944.

It is an arithmetic number, because the mean of its divisors is an integer number (107564730714).

Almost surely, 2^{1311252236512} is an apocalyptic number.

It is an amenable number.

1311252236512 is a deficient number, since it is larger than the sum of its proper divisors (1270301300624).

1311252236512 is a wasteful number, since it uses less digits than its factorization.

1311252236512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407890 (or 407882 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

Adding to 1311252236512 its reverse (2156322521131), we get a palindrome (3467574757643).

The spelling of 1311252236512 in words is "one trillion, three hundred eleven billion, two hundred fifty-two million, two hundred thirty-six thousand, five hundred twelve".