1311321404036 has 24 divisors (see below), whose sum is σ = 2693525048256. Its totient is φ = 546805836000.

The previous prime is 1311321404027. The next prime is 1311321404051. The reversal of 1311321404036 is 6304041231131.

It is a happy 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, 632876090 + ... + 632878161.

It is an arithmetic number, because the mean of its divisors is an integer number (112230210344).

Almost surely, 2^{1311321404036} is an apocalyptic number.

It is an amenable number.

1311321404036 is an abundant number, since it is smaller than the sum of its proper divisors (1382203644220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311321404036 is a wasteful number, since it uses less digits than its factorization.

1311321404036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265754299 (or 1265754297 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 1311321404036 its reverse (6304041231131), we get a palindrome (7615362635167).

The spelling of 1311321404036 in words is "one trillion, three hundred eleven billion, three hundred twenty-one million, four hundred four thousand, thirty-six".