1311022241 has 4 divisors (see below), whose sum is σ = 1368023232. Its totient is φ = 1254021252.

The previous prime is 1311022217. The next prime is 1311022247. The reversal of 1311022241 is 1422201131.

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.

It is a cyclic number.

It is not a de Polignac number, because 1311022241 - 2⁶ = 1311022177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311022247) 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, 28500461 + ... + 28500506.

It is an arithmetic number, because the mean of its divisors is an integer number (342005808).

Almost surely, 2^1311022241 is an apocalyptic number.

It is an amenable number.

1311022241 is a deficient number, since it is larger than the sum of its proper divisors (57000991).

1311022241 is an equidigital number, since it uses as much as digits as its factorization.

1311022241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57000990.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1311022241 is about 36208.0411096762. The cubic root of 1311022241 is about 1094.4687180346.

Adding to 1311022241 its reverse (1422201131), we get a palindrome (2733223372).

The spelling of 1311022241 in words is "one billion, three hundred eleven million, twenty-two thousand, two hundred forty-one".