1311223223 has 4 divisors (see below), whose sum is σ = 1311385320. Its totient is φ = 1311061128.

The previous prime is 1311223211. The next prime is 1311223241. The reversal of 1311223223 is 3223221131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311223223 - 2⁶ = 1311223159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311223195 and 1311223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311223283) 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, 68240 + ... + 85317.

It is an arithmetic number, because the mean of its divisors is an integer number (327846330).

Almost surely, 2^1311223223 is an apocalyptic number.

1311223223 is a deficient number, since it is larger than the sum of its proper divisors (162097).

1311223223 is an equidigital number, since it uses as much as digits as its factorization.

1311223223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162096.

The product of its digits is 432, while the sum is 20.

The square root of 1311223223 is about 36210.8163812969. The cubic root of 1311223223 is about 1094.5246431657.

Adding to 1311223223 its reverse (3223221131), we get a palindrome (4534444354).

The spelling of 1311223223 in words is "one billion, three hundred eleven million, two hundred twenty-three thousand, two hundred twenty-three".