1311423321245 has 16 divisors (see below), whose sum is σ = 1585576110720. Its totient is φ = 1041242140224.

The previous prime is 1311423321223. The next prime is 1311423321281. The reversal of 1311423321245 is 5421233241131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311423321245 - 2¹⁴ = 1311423304861 is a prime.

It is a super-2 number, since 2×1311423321245² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298097 + ... + 1646726.

It is an arithmetic number, because the mean of its divisors is an integer number (99098506920).

Almost surely, 2^{1311423321245} is an apocalyptic number.

It is an amenable number.

1311423321245 is a deficient number, since it is larger than the sum of its proper divisors (274152789475).

1311423321245 is a wasteful number, since it uses less digits than its factorization.

1311423321245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945844.

The product of its digits is 17280, while the sum is 32.

Adding to 1311423321245 its reverse (5421233241131), we get a palindrome (6732656562376).

The spelling of 1311423321245 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, three hundred twenty-one thousand, two hundred forty-five".