1305103211 has 4 divisors (see below), whose sum is σ = 1350106800. Its totient is φ = 1260099624.

The previous prime is 1305103207. The next prime is 1305103213. The reversal of 1305103211 is 1123015031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1123015031 = 233 ⋅4819807.

It is a cyclic number.

It is not a de Polignac number, because 1305103211 - 2² = 1305103207 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 1305103211.

It is not an unprimeable number, because it can be changed into a prime (1305103213) 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, 22501751 + ... + 22501808.

It is an arithmetic number, because the mean of its divisors is an integer number (337526700).

Almost surely, 2^1305103211 is an apocalyptic number.

1305103211 is a deficient number, since it is larger than the sum of its proper divisors (45003589).

1305103211 is an equidigital number, since it uses as much as digits as its factorization.

1305103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45003588.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1305103211 is about 36126.2122426362. The cubic root of 1305103211 is about 1092.8191230865.

Adding to 1305103211 its reverse (1123015031), we get a palindrome (2428118242).

The spelling of 1305103211 in words is "one billion, three hundred five million, one hundred three thousand, two hundred eleven".