1311241233 has 4 divisors (see below), whose sum is σ = 1748321648. Its totient is φ = 874160820.

The previous prime is 1311241223. The next prime is 1311241241. The reversal of 1311241233 is 3321421131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1311241233 - 2²² = 1307046929 is a prime.

It is a super-2 number, since 2×1311241233² = 3438707142238720578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311241223) 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, 218540203 + ... + 218540208.

It is an arithmetic number, because the mean of its divisors is an integer number (437080412).

Almost surely, 2^1311241233 is an apocalyptic number.

It is an amenable number.

1311241233 is a deficient number, since it is larger than the sum of its proper divisors (437080415).

1311241233 is an equidigital number, since it uses as much as digits as its factorization.

1311241233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437080414.

The product of its digits is 432, while the sum is 21.

The square root of 1311241233 is about 36211.0650630439. The cubic root of 1311241233 is about 1094.5296543385.

Adding to 1311241233 its reverse (3321421131), we get a palindrome (4632662364).

It can be divided in two parts, 13112 and 41233, that added together give a palindrome (54345).

The spelling of 1311241233 in words is "one billion, three hundred eleven million, two hundred forty-one thousand, two hundred thirty-three".