1212323313 has 4 divisors (see below), whose sum is σ = 1616431088. Its totient is φ = 808215540.

The previous prime is 1212323309. The next prime is 1212323317. The reversal of 1212323313 is 3133232121.

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 (1212323309) and next prime (1212323317).

It is not a de Polignac number, because 1212323313 - 2² = 1212323309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212323313.

It is not an unprimeable number, because it can be changed into a prime (1212323317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202053883 + ... + 202053888.

It is an arithmetic number, because the mean of its divisors is an integer number (404107772).

Almost surely, 2^1212323313 is an apocalyptic number.

It is an amenable number.

1212323313 is a deficient number, since it is larger than the sum of its proper divisors (404107775).

1212323313 is an equidigital number, since it uses as much as digits as its factorization.

1212323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404107774.

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

The square root of 1212323313 is about 34818.4335230636. The cubic root of 1212323313 is about 1066.2838193217.

Adding to 1212323313 its reverse (3133232121), we get a palindrome (4345555434).

The spelling of 1212323313 in words is "one billion, two hundred twelve million, three hundred twenty-three thousand, three hundred thirteen".