1311223233 has 16 divisors (see below), whose sum is σ = 1782933120. Its totient is φ = 856861824.

The previous prime is 1311223211. The next prime is 1311223241. The reversal of 1311223233 is 3323221131.

1311223233 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1311223233 - 2⁵ = 1311223201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311223283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204013 + ... + 210341.

It is an arithmetic number, because the mean of its divisors is an integer number (111433320).

Almost surely, 2^1311223233 is an apocalyptic number.

It is an amenable number.

1311223233 is a deficient number, since it is larger than the sum of its proper divisors (471709887).

1311223233 is a wasteful number, since it uses less digits than its factorization.

1311223233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7688.

The product of its digits is 648, while the sum is 21.

The square root of 1311223233 is about 36210.8165193772. The cubic root of 1311223233 is about 1094.5246459482.

Adding to 1311223233 its reverse (3323221131), we get a palindrome (4634444364).

The spelling of 1311223233 in words is "one billion, three hundred eleven million, two hundred twenty-three thousand, two hundred thirty-three".