1311221441442 has 128 divisors (see below), whose sum is σ = 3142045209600. Its totient is φ = 360265328640.

The previous prime is 1311221441423. The next prime is 1311221441449. The reversal of 1311221441442 is 2441441221131.

It is not an unprimeable number, because it can be changed into a prime (1311221441449) 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 63 ways as a sum of consecutive naturals, for example, 3335809 + ... + 3708107.

It is an arithmetic number, because the mean of its divisors is an integer number (24547228200).

Almost surely, 2^{1311221441442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311221441442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571022604800).

1311221441442 is an abundant number, since it is smaller than the sum of its proper divisors (1830823768158).

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

1311221441442 is a wasteful number, since it uses less digits than its factorization.

1311221441442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372448.

The product of its digits is 6144, while the sum is 30.

Adding to 1311221441442 its reverse (2441441221131), we get a palindrome (3752662662573).

The spelling of 1311221441442 in words is "one trillion, three hundred eleven billion, two hundred twenty-one million, four hundred forty-one thousand, four hundred forty-two".