1312233311 has 4 divisors (see below), whose sum is σ = 1313761800. Its totient is φ = 1310704824.

The previous prime is 1312233269. The next prime is 1312233323. The reversal of 1312233311 is 1133322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1133322131 = 5081 ⋅223051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312233311 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 (1312233011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762956 + ... + 764673.

It is an arithmetic number, because the mean of its divisors is an integer number (328440450).

Almost surely, 2^1312233311 is an apocalyptic number.

1312233311 is a deficient number, since it is larger than the sum of its proper divisors (1528489).

1312233311 is an equidigital number, since it uses as much as digits as its factorization.

1312233311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528488.

The product of its digits is 324, while the sum is 20.

The square root of 1312233311 is about 36224.7610206058. The cubic root of 1312233311 is about 1094.8056231500.

Adding to 1312233311 its reverse (1133322131), we get a palindrome (2445555442).

The spelling of 1312233311 in words is "one billion, three hundred twelve million, two hundred thirty-three thousand, three hundred eleven".