1311022242 has 24 divisors (see below), whose sum is σ = 2880558720. Its totient is φ = 430851960.

The previous prime is 1311022217. The next prime is 1311022247. The reversal of 1311022242 is 2422201131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 511642 + ... + 514197.

It is an arithmetic number, because the mean of its divisors is an integer number (120023280).

Almost surely, 2^1311022242 is an apocalyptic number.

1311022242 is an abundant number, since it is smaller than the sum of its proper divisors (1569536478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311022242 is a wasteful number, since it uses less digits than its factorization.

1311022242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025918 (or 1025915 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1311022242 is about 36208.0411234853. The cubic root of 1311022242 is about 1094.4687183128.

Adding to 1311022242 its reverse (2422201131), we get a palindrome (3733223373).

The spelling of 1311022242 in words is "one billion, three hundred eleven million, twenty-two thousand, two hundred forty-two".