1311103512326 has 4 divisors (see below), whose sum is σ = 1966655268492. Its totient is φ = 655551756162.

The previous prime is 1311103512293. The next prime is 1311103512343. The reversal of 1311103512326 is 6232153011131.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327775878080 + ... + 327775878083.

It is an arithmetic number, because the mean of its divisors is an integer number (491663817123).

Almost surely, 2^{1311103512326} is an apocalyptic number.

1311103512326 is a deficient number, since it is larger than the sum of its proper divisors (655551756166).

1311103512326 is an equidigital number, since it uses as much as digits as its factorization.

1311103512326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655551756165.

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 1311103512326 its reverse (6232153011131), we get a palindrome (7543256523457).

The spelling of 1311103512326 in words is "one trillion, three hundred eleven billion, one hundred three million, five hundred twelve thousand, three hundred twenty-six".