1313203211 has 4 divisors (see below), whose sum is σ = 1313363232. Its totient is φ = 1313043192.

The previous prime is 1313203163. The next prime is 1313203237. The reversal of 1313203211 is 1123023131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1123023131 = 43 ⋅26116817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313203211 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 1313203211.

It is not an unprimeable number, because it can be changed into a prime (1313203261) 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, 66995 + ... + 84348.

It is an arithmetic number, because the mean of its divisors is an integer number (328340808).

Almost surely, 2^1313203211 is an apocalyptic number.

1313203211 is a deficient number, since it is larger than the sum of its proper divisors (160021).

1313203211 is an equidigital number, since it uses as much as digits as its factorization.

1313203211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160020.

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

The square root of 1313203211 is about 36238.1457996957. The cubic root of 1313203211 is about 1095.0752882214.

Adding to 1313203211 its reverse (1123023131), we get a palindrome (2436226342).

The spelling of 1313203211 in words is "one billion, three hundred thirteen million, two hundred three thousand, two hundred eleven".