1312040311 has 16 divisors (see below), whose sum is σ = 1381072896. Its totient is φ = 1244880000.

The previous prime is 1312040309. The next prime is 1312040339. The reversal of 1312040311 is 1130402131.

It is a cyclic number.

It is not a de Polignac number, because 1312040311 - 2¹ = 1312040309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312040341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418831 + ... + 421951.

It is an arithmetic number, because the mean of its divisors is an integer number (86317056).

Almost surely, 2^1312040311 is an apocalyptic number.

1312040311 is a deficient number, since it is larger than the sum of its proper divisors (69032585).

1312040311 is a wasteful number, since it uses less digits than its factorization.

1312040311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1312040311 is about 36222.0969989315. The cubic root of 1312040311 is about 1094.7519467589.

Adding to 1312040311 its reverse (1130402131), we get a palindrome (2442442442).

The spelling of 1312040311 in words is "one billion, three hundred twelve million, forty thousand, three hundred eleven".