1312232311 has 4 divisors (see below), whose sum is σ = 1413173272. Its totient is φ = 1211291352.

The previous prime is 1312232297. The next prime is 1312232357. The reversal of 1312232311 is 1132322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1132322131 = 23 ⋅49231397.

It is a cyclic number.

It is not a de Polignac number, because 1312232311 - 2⁵ = 1312232279 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 (1312232381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50470461 + ... + 50470486.

It is an arithmetic number, because the mean of its divisors is an integer number (353293318).

Almost surely, 2^1312232311 is an apocalyptic number.

1312232311 is a deficient number, since it is larger than the sum of its proper divisors (100940961).

1312232311 is a wasteful number, since it uses less digits than its factorization.

1312232311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100940960.

The product of its digits is 216, while the sum is 19.

The square root of 1312232311 is about 36224.7472178896. The cubic root of 1312232311 is about 1094.8053450476.

Adding to 1312232311 its reverse (1132322131), we get a palindrome (2444554442).

The spelling of 1312232311 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, three hundred eleven".