1311320044243 has 8 divisors (see below), whose sum is σ = 1430688112560. Its totient is φ = 1191978168480.

The previous prime is 1311320044219. The next prime is 1311320044291. The reversal of 1311320044243 is 3424400231131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311320044243 - 2²⁵ = 1311286489811 is a prime.

It is a super-3 number, since 3×1311320044243³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311320041243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6443380 + ... + 6643777.

It is an arithmetic number, because the mean of its divisors is an integer number (178836014070).

Almost surely, 2^{1311320044243} is an apocalyptic number.

1311320044243 is a deficient number, since it is larger than the sum of its proper divisors (119368068317).

1311320044243 is a wasteful number, since it uses less digits than its factorization.

1311320044243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13096277.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1311320044243 its reverse (3424400231131), we get a palindrome (4735720275374).

The spelling of 1311320044243 in words is "one trillion, three hundred eleven billion, three hundred twenty million, forty-four thousand, two hundred forty-three".