1213323233 has 4 divisors (see below), whose sum is σ = 1213742100. Its totient is φ = 1212904368.

The previous prime is 1213323193. The next prime is 1213323247. The reversal of 1213323233 is 3323233121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1202147584 + 11175649 = 34672^2 + 3343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213323233 - 2⁸ = 1213322977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213323199 and 1213323208.

It is not an unprimeable number, because it can be changed into a prime (1213323533) 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, 205058 + ... + 210891.

It is an arithmetic number, because the mean of its divisors is an integer number (303435525).

Almost surely, 2^1213323233 is an apocalyptic number.

It is an amenable number.

1213323233 is a deficient number, since it is larger than the sum of its proper divisors (418867).

1213323233 is an equidigital number, since it uses as much as digits as its factorization.

1213323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418866.

The product of its digits is 1944, while the sum is 23.

The square root of 1213323233 is about 34832.7896241458. The cubic root of 1213323233 is about 1066.5768944739.

Adding to 1213323233 its reverse (3323233121), we get a palindrome (4536556354).

The spelling of 1213323233 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred thirty-three".