1201323313 has 4 divisors (see below), whose sum is σ = 1202091520. Its totient is φ = 1200555108.

The previous prime is 1201323311. The next prime is 1201323323. The reversal of 1201323313 is 3133231021.

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 a cyclic number.

It is not a de Polignac number, because 1201323313 - 2¹ = 1201323311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201323311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381753 + ... + 384886.

It is an arithmetic number, because the mean of its divisors is an integer number (300522880).

Almost surely, 2^1201323313 is an apocalyptic number.

It is an amenable number.

1201323313 is a deficient number, since it is larger than the sum of its proper divisors (768207).

1201323313 is an equidigital number, since it uses as much as digits as its factorization.

1201323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768206.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1201323313 is about 34660.1112664111. Note that the first 3 decimals coincide. The cubic root of 1201323313 is about 1063.0490451003.

Adding to 1201323313 its reverse (3133231021), we get a palindrome (4334554334).

The spelling of 1201323313 in words is "one billion, two hundred one million, three hundred twenty-three thousand, three hundred thirteen".