1312133201 has 4 divisors (see below), whose sum is σ = 1312837872. Its totient is φ = 1311428532.

The previous prime is 1312133191. The next prime is 1312133213. The reversal of 1312133201 is 1023312131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1023312131 = 12841 ⋅79691.

It is a cyclic number.

It is not a de Polignac number, because 1312133201 - 2¹⁰ = 1312132177 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 1312133201.

It is not an unprimeable number, because it can be changed into a prime (1312133281) 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, 349535 + ... + 353268.

It is an arithmetic number, because the mean of its divisors is an integer number (328209468).

Almost surely, 2^1312133201 is an apocalyptic number.

It is an amenable number.

1312133201 is a deficient number, since it is larger than the sum of its proper divisors (704671).

1312133201 is an equidigital number, since it uses as much as digits as its factorization.

1312133201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704670.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1312133201 is about 36223.3792045966. The cubic root of 1312133201 is about 1094.7777816127. Note that the first 4 decimals are identical.

Adding to 1312133201 its reverse (1023312131), we get a palindrome (2335445332).

The spelling of 1312133201 in words is "one billion, three hundred twelve million, one hundred thirty-three thousand, two hundred one".