1311213241 has 16 divisors (see below), whose sum is σ = 1428988176. Its totient is φ = 1195923456.

The previous prime is 1311213217. The next prime is 1311213301. The reversal of 1311213241 is 1423121131.

It can be written as a sum of positive squares in 8 ways, for example, as 700925625 + 610287616 = 26475^2 + 24704^2 .

It is not a de Polignac number, because 1311213241 - 2²⁹ = 774342329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311213641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546741 + ... + 549133.

It is an arithmetic number, because the mean of its divisors is an integer number (89311761).

Almost surely, 2^1311213241 is an apocalyptic number.

It is an amenable number.

1311213241 is a deficient number, since it is larger than the sum of its proper divisors (117774935).

1311213241 is a wasteful number, since it uses less digits than its factorization.

1311213241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892.

The product of its digits is 144, while the sum is 19.

The square root of 1311213241 is about 36210.6785492898. The cubic root of 1311213241 is about 1094.5218657152.

Adding to 1311213241 its reverse (1423121131), we get a palindrome (2734334372).

The spelling of 1311213241 in words is "one billion, three hundred eleven million, two hundred thirteen thousand, two hundred forty-one".