1311211441 has 4 divisors (see below), whose sum is σ = 1312262500. Its totient is φ = 1310160384.

The previous prime is 1311211417. The next prime is 1311211453. The reversal of 1311211441 is 1441121131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 972504225 + 338707216 = 31185^2 + 18404^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311211441 - 2¹⁹ = 1310687153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311211471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523656 + ... + 526153.

It is an arithmetic number, because the mean of its divisors is an integer number (328065625).

Almost surely, 2^1311211441 is an apocalyptic number.

It is an amenable number.

1311211441 is a deficient number, since it is larger than the sum of its proper divisors (1051059).

1311211441 is a wasteful number, since it uses less digits than its factorization.

1311211441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051058.

The product of its digits is 96, while the sum is 19.

The square root of 1311211441 is about 36210.6536947346. The cubic root of 1311211441 is about 1094.5213648711.

Adding to 1311211441 its reverse (1441121131), we get a palindrome (2752332572).

The spelling of 1311211441 in words is "one billion, three hundred eleven million, two hundred eleven thousand, four hundred forty-one".