1311400040205 has 32 divisors (see below), whose sum is σ = 2183315295744. Its totient is φ = 671616498176.

The previous prime is 1311400040183. The next prime is 1311400040221. The reversal of 1311400040205 is 5020400041131.

It is a cyclic number.

It is not a de Polignac number, because 1311400040205 - 2⁹ = 1311400039693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17511144 + ... + 17585873.

It is an arithmetic number, because the mean of its divisors is an integer number (68228602992).

Almost surely, 2^{1311400040205} is an apocalyptic number.

1311400040205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311400040205 is a deficient number, since it is larger than the sum of its proper divisors (871915255539).

1311400040205 is a wasteful number, since it uses less digits than its factorization.

1311400040205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35097125.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1311400040205 its reverse (5020400041131), we get a palindrome (6331800081336).

The spelling of 1311400040205 in words is "one trillion, three hundred eleven billion, four hundred million, forty thousand, two hundred five".