1311242233 has 4 divisors (see below), whose sum is σ = 1498562560. Its totient is φ = 1123921908.

The previous prime is 1311242227. The next prime is 1311242239. The reversal of 1311242233 is 3322421131.

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 an interprime number because it is at equal distance from previous prime (1311242227) and next prime (1311242239).

It is a cyclic number.

It is not a de Polignac number, because 1311242233 - 2⁹ = 1311241721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311242239) 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, 93660153 + ... + 93660166.

It is an arithmetic number, because the mean of its divisors is an integer number (374640640).

Almost surely, 2^1311242233 is an apocalyptic number.

It is an amenable number.

1311242233 is a deficient number, since it is larger than the sum of its proper divisors (187320327).

1311242233 is an equidigital number, since it uses as much as digits as its factorization.

1311242233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187320326.

The product of its digits is 864, while the sum is 22.

The square root of 1311242233 is about 36211.0788709754. The cubic root of 1311242233 is about 1094.5299325811.

Adding to 1311242233 its reverse (3322421131), we get a palindrome (4633663364).

The spelling of 1311242233 in words is "one billion, three hundred eleven million, two hundred forty-two thousand, two hundred thirty-three".